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Library of Congress Subject Areas (36473)
- A General Works (13)
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- B Philosophy. Psychology. Religion (69)
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- C Auxiliary Sciences of History (60)
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- D History General and Old World (42)
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- E History America (6)
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- F History United States, Canada, Latin America (3)
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- G Geography. Anthropology. Recreation (116)
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- H Social Sciences (6459)
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- J Political Science (522)
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- K Law (3754)
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- L Education (394)
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- M Music and Books on Music (1)
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- N Fine Arts (75)
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- P Language and Literature (2002)
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- Q Science (4635)
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- R Medicine (8320)
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- S Agriculture (5965)
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- T Technology (3854)
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  - TK Electrical engineering. Electronics Nuclear engineering (402)
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- U Military Science (2)
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- V Naval Science (372)
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  - VM Naval architecture. Shipbuilding. Marine engineering (271)
- Z Bibliography. Library Science. Information Resources (3)
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