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Library of Congress Subject Areas (17809)
- A General Works (350)
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- B Philosophy. Psychology. Religion (240)
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- C Auxiliary Sciences of History (29)
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- G Geography. Anthropology. Recreation (260)
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- M Music and Books on Music (18)
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- N Fine Arts (335)
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- R Medicine (759)
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- T Technology (1805)
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- U Military Science (6)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (150)
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