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Library of Congress Subject Areas (14404)
- A General Works (8)
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  - AM Museums (General). Collectors and collecting (General) (3)
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- B Philosophy. Psychology. Religion (1696)
  - B Philosophy (General) (283)
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- C Auxiliary Sciences of History (31)
  - C Auxiliary sciences of history (General) (2)
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- D History General and Old World (527)
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- E History America (62)
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- F History United States, Canada, Latin America (55)
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- G Geography. Anthropology. Recreation (318)
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- H Social Sciences (5237)
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- K Law (903)
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- L Education (213)
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- M Music and Books on Music (22)
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- N Fine Arts (168)
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- P Language and Literature (1210)
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- Q Science (3518)
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- R Medicine (1152)
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- S Agriculture (53)
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- T Technology (307)
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  - TK Electrical engineering. Electronics Nuclear engineering (229)
  - TL Motor vehicles. Aeronautics. Astronautics (5)
  - TR Photography (19)
- U Military Science (24)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (67)
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  - Z719 Libraries (General) (2)
  - ZA Information resources (45)
    - ZA4050 Electronic information resources (38)
    - ZA4450 Databases (4)