<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/lcc#ClassNumber> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/lcc#Range> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#authoritativeLabel> "By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasVariant> _:b8iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b8iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/lcc#IndexTerm> .
_:b8iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.loc.gov/mads/rdf/v1#variantLabel> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)--By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasBroaderAuthority> <http://id.loc.gov/authorities/classification/RA576-RA578> .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#ComplexSubject> .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.w3.org/2000/01/rdf-schema#label> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)" .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.loc.gov/mads/rdf/v1#componentList> _:b20iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b20iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b22iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b20iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b026 .
_:b22iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Collection> .
_:b22iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Medicine" .
_:b026 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b28iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b026 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b032 .
_:b28iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
_:b28iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Public aspects of medicine" .
_:b032 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b34iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b032 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b038 .
_:b34iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
_:b34iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Public health. Hygiene. Preventive medicine" .
_:b038 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b40iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b038 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b044 .
_:b40iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
_:b40iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Environmental health" .
_:b044 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b46iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b044 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> _:b050 .
_:b46iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
_:b46iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Air" .
_:b050 <http://www.w3.org/1999/02/22-rdf-syntax-ns#first> _:b52iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b050 <http://www.w3.org/1999/02/22-rdf-syntax-ns#rest> <http://www.w3.org/1999/02/22-rdf-syntax-ns#nil> .
_:b52iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Topic> .
_:b52iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2000/01/rdf-schema#label> "Air pollution (General)" .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.loc.gov/mads/rdf/v1#authoritativeLabel> "Air pollution (General)" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#isMemberOfMADSCollection> <http://id.loc.gov/authorities/classification/R> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.L4> .
<http://id.loc.gov/authorities/classification/RA577.L4> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.L4> <http://www.w3.org/2000/01/rdf-schema#label> "Lead" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.M86> .
<http://id.loc.gov/authorities/classification/RA577.M86> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.M86> <http://www.w3.org/2000/01/rdf-schema#label> "Mutagens" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.P56> .
<http://id.loc.gov/authorities/classification/RA577.P56> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.P56> <http://www.w3.org/2000/01/rdf-schema#label> "Photochemical oxidants" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.N52> .
<http://id.loc.gov/authorities/classification/RA577.N52> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.N52> <http://www.w3.org/2000/01/rdf-schema#label> "Nickel" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.D8> .
<http://id.loc.gov/authorities/classification/RA577.D8> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.D8> <http://www.w3.org/2000/01/rdf-schema#label> "Dust" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.M28> .
<http://id.loc.gov/authorities/classification/RA577.M28> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.M28> <http://www.w3.org/2000/01/rdf-schema#label> "Manganese" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.C63> .
<http://id.loc.gov/authorities/classification/RA577.C63> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.C63> <http://www.w3.org/2000/01/rdf-schema#label> "Coal" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.V35> .
<http://id.loc.gov/authorities/classification/RA577.V35> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.V35> <http://www.w3.org/2000/01/rdf-schema#label> "Vanadium" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.A9> .
<http://id.loc.gov/authorities/classification/RA577.A9> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.A9> <http://www.w3.org/2000/01/rdf-schema#label> "Automobile exhaust gas. Gasoline" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.S9> .
<http://id.loc.gov/authorities/classification/RA577.S9> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.S9> <http://www.w3.org/2000/01/rdf-schema#label> "Sulfur compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.C36> .
<http://id.loc.gov/authorities/classification/RA577.C36> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.C36> <http://www.w3.org/2000/01/rdf-schema#label> "Carbon monoxide" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.F55> .
<http://id.loc.gov/authorities/classification/RA577.F55> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.F55> <http://www.w3.org/2000/01/rdf-schema#label> "Fluorine compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.C45> .
<http://id.loc.gov/authorities/classification/RA577.C45> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.C45> <http://www.w3.org/2000/01/rdf-schema#label> "Chlorine" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.O97> .
<http://id.loc.gov/authorities/classification/RA577.O97> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.O97> <http://www.w3.org/2000/01/rdf-schema#label> "Ozone" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.M4> .
<http://id.loc.gov/authorities/classification/RA577.M4> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.M4> <http://www.w3.org/2000/01/rdf-schema#label> "Mercury" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.D53> .
<http://id.loc.gov/authorities/classification/RA577.D53> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.D53> <http://www.w3.org/2000/01/rdf-schema#label> "Diesel motor exhaust gas" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.N56> .
<http://id.loc.gov/authorities/classification/RA577.N56> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.N56> <http://www.w3.org/2000/01/rdf-schema#label> "Nitrogen" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.A68> .
<http://id.loc.gov/authorities/classification/RA577.A68> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.A68> <http://www.w3.org/2000/01/rdf-schema#label> "Aromatic compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#hasNarrowerAuthority> <http://id.loc.gov/authorities/classification/RA577.P6> .
<http://id.loc.gov/authorities/classification/RA577.P6> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.loc.gov/mads/rdf/v1#Authority> .
<http://id.loc.gov/authorities/classification/RA577.P6> <http://www.w3.org/2000/01/rdf-schema#label> "Pollen" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#isMemberOfMADSScheme> <http://id.loc.gov/authorities/classification> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2000/01/rdf-schema#label> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)--By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#code> "RA577.A-RA577.Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#codeStart> "RA577.A" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#codeEnd> "RA577.Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://id.loc.gov/ontologies/lcc#synthesizedFromSchedule> <http://id.loc.gov/authorities/classification/cf94099975> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#adminMetadata> _:b147iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b147iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/RecordInfo#RecordInfo> .
_:b147iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordChangeDate> "1993-04-23T00:00:00"^^<http://www.w3.org/2001/XMLSchema#dateTime> .
_:b147iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordStatus> "new"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b147iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordContentSource> <http://id.loc.gov/vocabulary/organizations/dlc> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.loc.gov/mads/rdf/v1#adminMetadata> _:b160iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b160iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://id.loc.gov/ontologies/RecordInfo#RecordInfo> .
_:b160iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordChangeDate> "1997-11-15T11:39:19"^^<http://www.w3.org/2001/XMLSchema#dateTime> .
_:b160iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordStatus> "revised"^^<http://www.w3.org/2001/XMLSchema#string> .
_:b160iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://id.loc.gov/ontologies/RecordInfo#recordContentSource> <http://id.loc.gov/vocabulary/organizations/dlc> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#prefLabel> "By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2008/05/skos-xl#altLabel> _:b174iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b174iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2008/05/skos-xl#Label> .
_:b174iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/2008/05/skos-xl#literalForm> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)--By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#broader> <http://id.loc.gov/authorities/classification/RA576-RA578> .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.w3.org/2004/02/skos/core#prefLabel> "Air pollution (General)" .
<http://id.loc.gov/authorities/classification/RA576-RA578> <http://www.w3.org/2000/01/rdf-schema#label> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.L4> .
<http://id.loc.gov/authorities/classification/RA577.L4> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.L4> <http://www.w3.org/2000/01/rdf-schema#label> "Lead" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.M86> .
<http://id.loc.gov/authorities/classification/RA577.M86> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.M86> <http://www.w3.org/2000/01/rdf-schema#label> "Mutagens" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.P56> .
<http://id.loc.gov/authorities/classification/RA577.P56> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.P56> <http://www.w3.org/2000/01/rdf-schema#label> "Photochemical oxidants" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.N52> .
<http://id.loc.gov/authorities/classification/RA577.N52> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.N52> <http://www.w3.org/2000/01/rdf-schema#label> "Nickel" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.D8> .
<http://id.loc.gov/authorities/classification/RA577.D8> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.D8> <http://www.w3.org/2000/01/rdf-schema#label> "Dust" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.M28> .
<http://id.loc.gov/authorities/classification/RA577.M28> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.M28> <http://www.w3.org/2000/01/rdf-schema#label> "Manganese" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.C63> .
<http://id.loc.gov/authorities/classification/RA577.C63> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.C63> <http://www.w3.org/2000/01/rdf-schema#label> "Coal" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.V35> .
<http://id.loc.gov/authorities/classification/RA577.V35> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.V35> <http://www.w3.org/2000/01/rdf-schema#label> "Vanadium" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.A9> .
<http://id.loc.gov/authorities/classification/RA577.A9> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.A9> <http://www.w3.org/2000/01/rdf-schema#label> "Automobile exhaust gas. Gasoline" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.S9> .
<http://id.loc.gov/authorities/classification/RA577.S9> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.S9> <http://www.w3.org/2000/01/rdf-schema#label> "Sulfur compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.C36> .
<http://id.loc.gov/authorities/classification/RA577.C36> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.C36> <http://www.w3.org/2000/01/rdf-schema#label> "Carbon monoxide" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.F55> .
<http://id.loc.gov/authorities/classification/RA577.F55> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.F55> <http://www.w3.org/2000/01/rdf-schema#label> "Fluorine compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.C45> .
<http://id.loc.gov/authorities/classification/RA577.C45> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.C45> <http://www.w3.org/2000/01/rdf-schema#label> "Chlorine" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.O97> .
<http://id.loc.gov/authorities/classification/RA577.O97> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.O97> <http://www.w3.org/2000/01/rdf-schema#label> "Ozone" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.M4> .
<http://id.loc.gov/authorities/classification/RA577.M4> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.M4> <http://www.w3.org/2000/01/rdf-schema#label> "Mercury" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.D53> .
<http://id.loc.gov/authorities/classification/RA577.D53> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.D53> <http://www.w3.org/2000/01/rdf-schema#label> "Diesel motor exhaust gas" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.N56> .
<http://id.loc.gov/authorities/classification/RA577.N56> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.N56> <http://www.w3.org/2000/01/rdf-schema#label> "Nitrogen" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.A68> .
<http://id.loc.gov/authorities/classification/RA577.A68> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.A68> <http://www.w3.org/2000/01/rdf-schema#label> "Aromatic compounds" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#narrower> <http://id.loc.gov/authorities/classification/RA577.P6> .
<http://id.loc.gov/authorities/classification/RA577.P6> <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://www.w3.org/2004/02/skos/core#Concept> .
<http://id.loc.gov/authorities/classification/RA577.P6> <http://www.w3.org/2000/01/rdf-schema#label> "Pollen" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#notation> "RA577.A-RA577.Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#inScheme> <http://id.loc.gov/authorities/classification> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#altLabel> "Medicine--Public aspects of medicine--Public health. Hygiene. Preventive medicine--Environmental health--Air--Air pollution (General)--By substance, A-Z" .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#changeNote> _:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/vocab/changeset/schema#ChangeSet> .
_:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#subjectOfChange> <http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> .
_:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#creatorName> <http://id.loc.gov/vocabulary/organizations/dlc> .
_:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#createdDate> "1993-04-23T00:00:00"^^<http://www.w3.org/2001/XMLSchema#dateTime> .
_:b286iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#changeReason> "new"^^<http://www.w3.org/2001/XMLSchema#string> .
<http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> <http://www.w3.org/2004/02/skos/core#changeNote> _:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ .
_:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://www.w3.org/1999/02/22-rdf-syntax-ns#type> <http://purl.org/vocab/changeset/schema#ChangeSet> .
_:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#subjectOfChange> <http://id.loc.gov/authorities/classification/RA577.A-RA577.Z> .
_:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#creatorName> <http://id.loc.gov/vocabulary/organizations/dlc> .
_:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#createdDate> "1997-11-15T11:39:19"^^<http://www.w3.org/2001/XMLSchema#dateTime> .
_:b294iddOtlocdOtgovauthoritiesclassificationRA577dOtA-RA577dOtZ <http://purl.org/vocab/changeset/schema#changeReason> "revised"^^<http://www.w3.org/2001/XMLSchema#string> .