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Library of Congress Subject Areas (2317)
- A General Works (54)
  - AC Collections. Series. Collected works (15)
  - AI Indexes (General) (9)
  - AS Academies and learned societies (General) (32)
- B Philosophy. Psychology. Religion (15)
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- C Auxiliary Sciences of History (2)
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- G Geography. Anthropology. Recreation (7)
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- K Law (14)
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- L Education (531)
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- M Music and Books on Music (4)
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- P Language and Literature (2)
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- R Medicine (1893)
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- S Agriculture (3)
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- T Technology (94)
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- Z Bibliography. Library Science. Information Resources (51)
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  - ZA Information resources (30)
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