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Library of Congress Subject Areas (7269)
- A General Works (20)
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- B Philosophy. Psychology. Religion (2)
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- C Auxiliary Sciences of History (1)
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- D History General and Old World (3)
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- G Geography. Anthropology. Recreation (47)
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- H Social Sciences (2560)
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- J Political Science (158)
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- L Education (199)
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- Q Science (590)
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- R Medicine (6)
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- S Agriculture (1604)
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- T Technology (1432)
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- Z Bibliography. Library Science. Information Resources (163)
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