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Library of Congress Subject Areas (38940)
- A General Works (87)
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- B Philosophy. Psychology. Religion (4)
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- D History General and Old World (3)
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- E History America (2)
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- G Geography. Anthropology. Recreation (205)
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- H Social Sciences (16138)
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- J Political Science (1424)
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- M Music and Books on Music (3)
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- N Fine Arts (47)
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- Q Science (6751)
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- S Agriculture (3354)
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- T Technology (10662)
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- U Military Science (12)
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- Z Bibliography. Library Science. Information Resources (875)
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