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Library of Congress Subject Areas (17058)
- A General Works (9)
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  - AM Museums (General). Collectors and collecting (General) (3)
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- B Philosophy. Psychology. Religion (2018)
  - B Philosophy (General) (343)
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- C Auxiliary Sciences of History (49)
  - C Auxiliary sciences of history (General) (2)
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- D History General and Old World (609)
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- E History America (66)
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- F History United States, Canada, Latin America (60)
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- G Geography. Anthropology. Recreation (432)
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- H Social Sciences (6128)
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- K Law (1088)
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- L Education (284)
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- M Music and Books on Music (24)
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- N Fine Arts (216)
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- P Language and Literature (1400)
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- Q Science (4197)
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- R Medicine (1513)
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- S Agriculture (73)
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- T Technology (333)
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  - TA Engineering (General). Civil engineering (General) (5)
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  - TK Electrical engineering. Electronics Nuclear engineering (238)
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  - TR Photography (22)
- U Military Science (23)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (113)
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  - Z665 Library Science. Information Science (7)
  - Z719 Libraries (General) (2)
  - ZA Information resources (89)
    - ZA4050 Electronic information resources (79)
    - ZA4450 Databases (5)