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Library of Congress Subject Areas (15350)
- A General Works (9)
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  - AM Museums (General). Collectors and collecting (General) (3)
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  - AZ History of Scholarship The Humanities (2)
- B Philosophy. Psychology. Religion (1813)
  - B Philosophy (General) (302)
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- C Auxiliary Sciences of History (32)
  - C Auxiliary sciences of history (General) (2)
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- D History General and Old World (574)
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- E History America (65)
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- F History United States, Canada, Latin America (56)
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- G Geography. Anthropology. Recreation (364)
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- H Social Sciences (5602)
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- J Political Science (1472)
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- K Law (976)
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- L Education (246)
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- M Music and Books on Music (23)
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- N Fine Arts (181)
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- P Language and Literature (1282)
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- Q Science (3714)
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- R Medicine (1293)
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  - RB Pathology (8)
  - RC Internal medicine (547)
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    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (161)
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- S Agriculture (56)
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  - SH Aquaculture. Fisheries. Angling (14)
- T Technology (316)
  - T Technology (General) (54)
  - TA Engineering (General). Civil engineering (General) (3)
  - TD Environmental technology. Sanitary engineering (1)
  - TF Railroad engineering and operation (4)
  - TH Building construction (2)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (232)
  - TL Motor vehicles. Aeronautics. Astronautics (8)
  - TR Photography (20)
- U Military Science (24)
  - U Military Science (General) (24)
- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (75)
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  - Z719 Libraries (General) (2)
  - ZA Information resources (52)
    - ZA4050 Electronic information resources (44)
    - ZA4450 Databases (5)