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Library of Congress Subject Areas (2381)
- B Philosophy. Psychology. Religion (18)
  - BF Psychology (18)
- C Auxiliary Sciences of History (2)
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  - CB History of civilization (1)
- H Social Sciences (1449)
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  - HV Social pathology. Social and public welfare (137)
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- J Political Science (257)
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- L Education (3)
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  - N Visual arts (General) For photography, see TR (1)
- P Language and Literature (116)
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- Q Science (13)
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- R Medicine (3)
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- S Agriculture (72)
  - S Agriculture (General) (43)
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- T Technology (275)
  - T Technology (General) (143)
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