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Library of Congress Subject Areas (1934)
- A General Works (4)
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- B Philosophy. Psychology. Religion (7)
  - B Philosophy (General) (6)
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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 (13)
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- J Political Science (60)
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- Q Science (506)
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- R Medicine (28)
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- S Agriculture (478)
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- T Technology (558)
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- Z Bibliography. Library Science. Information Resources (124)
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