The Library of Congress > Linked Data Service
  Label Vocabulary Concept Subdivision Identifier
1. History LC Subject Headings (LCSH)
Topic General Subdivision sh99005024
Frontier troubles ; Frontier troubles
2. Commerce LC Subject Headings (LCSH)
Topic General Subdivision sh99001412
Commercial trade ; Foreign trade ; Trade
3. Economic conditions LC Subject Headings (LCSH)
Topic General Subdivision sh99005736
Economic history ; Socioeconomic status ; Socioeconomic status


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