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Library of Congress Subject Areas (18111)
- A General Works (12)
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  - AM Museums (General). Collectors and collecting (General) (7)
  - AZ History of Scholarship The Humanities (3)
- B Philosophy. Psychology. Religion (1464)
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- C Auxiliary Sciences of History (56)
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- D History General and Old World (715)
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- E History America (42)
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- F History United States, Canada, Latin America (60)
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- G Geography. Anthropology. Recreation (148)
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- L Education (945)
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- M Music and Books on Music (30)
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- N Fine Arts (135)
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- P Language and Literature (876)
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- Q Science (7583)
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- R Medicine (2778)
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  - RZ Other systems of medicine (9)
- S Agriculture (423)
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  - SH Aquaculture. Fisheries. Angling (6)
- T Technology (1876)
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  - TA Engineering (General). Civil engineering (General) (591)
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  - TH Building construction (28)
  - TJ Mechanical engineering and machinery (145)
  - TK Electrical engineering. Electronics Nuclear engineering (622)
  - TL Motor vehicles. Aeronautics. Astronautics (171)
  - TN Mining engineering. Metallurgy (44)
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  - TR Photography (26)
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- U Military Science (36)
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- V Naval Science (7)
  - V Naval Science (General) (6)
  - VM Naval architecture. Shipbuilding. Marine engineering (1)
- Z Bibliography. Library Science. Information Resources (94)
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  - Z665 Library Science. Information Science (26)
  - Z719 Libraries (General) (13)
  - ZA Information resources (49)
    - ZA4050 Electronic information resources (20)
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