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Library of Congress Subject Areas (2030)
- B Philosophy. Psychology. Religion (18)
  - B Philosophy (General) (4)
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- Confernces (2)
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- G Geography. Anthropology. Recreation (17)
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- N Fine Arts (28)
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- R Medicine (235)
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  - RZ Other systems of medicine (11)
- S Agriculture (14)
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- T Technology (592)
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  - TR Photography (3)
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- U Military Science (3)
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- V Naval Science (3)
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- Z Bibliography. Library Science. Information Resources (16)
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