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Library of Congress Subject Areas (15216)
- A General Works (8)
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  - AM Museums (General). Collectors and collecting (General) (3)
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- B Philosophy. Psychology. Religion (1798)
  - B Philosophy (General) (300)
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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 (569)
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- E History America (64)
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- F History United States, Canada, Latin America (55)
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- G Geography. Anthropology. Recreation (362)
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- H Social Sciences (5566)
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- J Political Science (1464)
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- K Law (960)
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- L Education (245)
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- M Music and Books on Music (23)
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- N Fine Arts (177)
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- P Language and Literature (1275)
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- Q Science (3679)
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  - QH Natural history (1079)
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- R Medicine (1267)
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    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (159)
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  - RV Botanic, Thomsonian, and eclectic medicine (1)
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- S Agriculture (55)
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  - SH Aquaculture. Fisheries. Angling (14)
- T Technology (315)
  - T Technology (General) (54)
  - TA Engineering (General). Civil engineering (General) (3)
  - TD Environmental technology. Sanitary engineering (1)
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  - TH Building construction (2)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (232)
  - TL Motor vehicles. Aeronautics. Astronautics (7)
  - TR Photography (20)
- U Military Science (24)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (75)
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  - Z665 Library Science. Information Science (6)
  - Z719 Libraries (General) (2)
  - ZA Information resources (52)
    - ZA4050 Electronic information resources (44)
    - ZA4450 Databases (5)