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Library of Congress Subject Areas (9818)
- A General Works (45)
  - AC Collections. Series. Collected works (31)
  - AI Indexes (General) (4)
  - AM Museums (General). Collectors and collecting (General) (9)
  - AS Academies and learned societies (General) (1)
- B Philosophy. Psychology. Religion (572)
  - B Philosophy (General) (114)
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- C Auxiliary Sciences of History (62)
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- D History General and Old World (136)
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- E History America (36)
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- F History United States, Canada, Latin America (88)
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- G Geography. Anthropology. Recreation (729)
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- H Social Sciences (3101)
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- L Education (2542)
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- M Music and Books on Music (259)
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- N Fine Arts (782)
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- Q Science (1907)
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- R Medicine (1416)
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- S Agriculture (1120)
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- T Technology (987)
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  - TX Home economics (10)
- U Military Science (8)
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- V Naval Science (35)
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  - VM Naval architecture. Shipbuilding. Marine engineering (16)
- Z Bibliography. Library Science. Information Resources (173)
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  - Z665 Library Science. Information Science (45)
  - Z719 Libraries (General) (15)
  - ZA Information resources (141)
    - ZA4050 Electronic information resources (64)
    - ZA4450 Databases (16)