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Library of Congress Subject Areas (1388)
- A General Works (4)
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- B Philosophy. Psychology. Religion (7)
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- C Auxiliary Sciences of History (1)
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- D History General and Old World (4)
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- G Geography. Anthropology. Recreation (11)
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- R Medicine (27)
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- S Agriculture (354)
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- Z Bibliography. Library Science. Information Resources (99)
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