. "Didactic literature"@en . . . . . . _:bnode12authoritiessubjectssh85037721 . _:bnode12authoritiessubjectssh85037721 . _:bnode12authoritiessubjectssh85037721 . _:bnode12authoritiessubjectssh85037721 "Library of Congress, Network Development and MARC Standards Office" . _:bnode12authoritiessubjectssh85037721 "1986-02-11T00:00:00"^^ . _:bnode12authoritiessubjectssh85037721 "new"^^ . _:bnode21authoritiessubjectssh85037721 . _:bnode21authoritiessubjectssh85037721 . _:bnode21authoritiessubjectssh85037721 . _:bnode21authoritiessubjectssh85037721 "Library of Congress, Network Development and MARC Standards Office" . _:bnode21authoritiessubjectssh85037721 "2010-10-20T10:48:26"^^ . _:bnode21authoritiessubjectssh85037721 "revised"^^ .