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Library of Congress Subject Areas (27361)
- A General Works (53)
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- B Philosophy. Psychology. Religion (948)
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- C Auxiliary Sciences of History (20)
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- D History General and Old World (303)
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- F History United States, Canada, Latin America (3)
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- G Geography. Anthropology. Recreation (1500)
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- H Social Sciences (12175)
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- J Political Science (2097)
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  - LD Individual institutions (United States) (1)
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- M Music and Books on Music (70)
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- N Fine Arts (94)
  - N Visual arts (General) For photography, see TR (48)
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- Q Science (3335)
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- R Medicine (181)
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- S Agriculture (138)
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- T Technology (2105)
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- U Military Science (45)
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- V Naval Science (2)
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