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Library of Congress Subject Areas (15025)
- A General Works (364)
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  - AI Indexes (General) (59)
  - AM Museums (General). Collectors and collecting (General) (6)
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- B Philosophy. Psychology. Religion (374)
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- C Auxiliary Sciences of History (3)
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- D History General and Old World (38)
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- G Geography. Anthropology. Recreation (43)
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- H Social Sciences (4276)
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- J Political Science (589)
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- M Music and Books on Music (2)
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- N Fine Arts (562)
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- Q Science (4819)
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- R Medicine (227)
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- S Agriculture (116)
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- T Technology (4660)
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- U Military Science (2)
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- V Naval Science (4)
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- Z Bibliography. Library Science. Information Resources (392)
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  - ZA Information resources (150)
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