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Library of Congress Subject Areas (14530)
- A General Works (269)
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  - AM Museums (General). Collectors and collecting (General) (12)
  - AS Academies and learned societies (General) (162)
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- B Philosophy. Psychology. Religion (206)
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- C Auxiliary Sciences of History (25)
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- F History United States, Canada, Latin America (2)
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- G Geography. Anthropology. Recreation (192)
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- H Social Sciences (3845)
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- M Music and Books on Music (14)
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- N Fine Arts (283)
  - N Visual arts (General) For photography, see TR (78)
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- R Medicine (603)
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- S Agriculture (97)
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- T Technology (1384)
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- U Military Science (6)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (121)
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  - Z719 Libraries (General) (43)
  - ZA Information resources (46)
    - ZA4050 Electronic information resources (19)
    - ZA4450 Databases (13)