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Library of Congress Subject Areas (22361)
- A General Works (15)
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  - AM Museums (General). Collectors and collecting (General) (1)
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- B Philosophy. Psychology. Religion (2174)
  - B Philosophy (General) (148)
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- C Auxiliary Sciences of History (31)
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- D History General and Old World (293)
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- E History America (15)
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- F History United States, Canada, Latin America (6)
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- G Geography. Anthropology. Recreation (1404)
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- L Education (2019)
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- M Music and Books on Music (204)
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- N Fine Arts (1040)
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- Q Science (6098)
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- R Medicine (2787)
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- S Agriculture (2374)
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- T Technology (3770)
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  - TH Building construction (281)
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  - TK Electrical engineering. Electronics Nuclear engineering (664)
  - TL Motor vehicles. Aeronautics. Astronautics (105)
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- U Military Science (18)
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- V Naval Science (75)
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- Z Bibliography. Library Science. Information Resources (175)
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  - Z719 Libraries (General) (8)
  - ZA Information resources (62)
    - ZA4050 Electronic information resources (18)
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