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Library of Congress Subject Areas (9020)
- A General Works (95)
  - AC Collections. Series. Collected works (90)
  - AS Academies and learned societies (General) (5)
- B Philosophy. Psychology. Religion (3014)
  - B Philosophy (General) (55)
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- G Geography. Anthropology. Recreation (4)
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- H Social Sciences (3363)
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  - HV Social pathology. Social and public welfare (2)
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- J Political Science (8)
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- L Education (383)
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  - LC Special aspects of education (1)
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- M Music and Books on Music (6)
  - M Music (4)
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- N Fine Arts (25)
  - N Visual arts (General) For photography, see TR (16)
  - NX Arts in general (9)
- P Language and Literature (118)
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- Q Science (525)
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- R Medicine (26)
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- S Agriculture (1613)
  - S Agriculture (General) (891)
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  - SH Aquaculture. Fisheries. Angling (86)
- T Technology (449)
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