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Library of Congress Subject Areas (37558)
- A General Works (842)
  - AC Collections. Series. Collected works (18)
  - AI Indexes (General) (65)
  - AM Museums (General). Collectors and collecting (General) (3)
  - AS Academies and learned societies (General) (9)
  - AZ History of Scholarship The Humanities (751)
- B Philosophy. Psychology. Religion (3965)
  - B Philosophy (General) (1188)
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- C Auxiliary Sciences of History (97)
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- D History General and Old World (1648)
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- E History America (8)
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- G Geography. Anthropology. Recreation (90)
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- L Education (16332)
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- M Music (328)
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- N Fine Arts (307)
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- P Language and Literature (6678)
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- Q Science (6706)
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- R Medicine (374)
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- S Agriculture (107)
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- T Technology (100)
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- U Military Science (54)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (124)
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  - ZA Information resources (101)
    - ZA4050 Electronic information resources (48)
    - ZA4450 Databases (10)