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Library of Congress Subject Areas (4008)
- B Philosophy. Psychology. Religion (197)
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- C Auxiliary Sciences of History (1)
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- D History General and Old World (7)
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- G Geography. Anthropology. Recreation (82)
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- H Social Sciences (1239)
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- M Music and Books on Music (7)
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- N Fine Arts (3)
  - N Visual arts (General) For photography, see TR (2)
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- P Language and Literature (904)
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- R Medicine (29)
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- S Agriculture (81)
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- T Technology (263)
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  - TA Engineering (General). Civil engineering (General) (121)
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- Z Bibliography. Library Science. Information Resources (95)
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