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Library of Congress Subject Areas (37803)
- A General Works (84)
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- B Philosophy. Psychology. Religion (3)
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- D History General and Old World (2)
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- E History America (1)
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- G Geography. Anthropology. Recreation (190)
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- H Social Sciences (15737)
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- J Political Science (1381)
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- M Music and Books on Music (2)
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- N Fine Arts (47)
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- S Agriculture (3187)
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- T Technology (10309)
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