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Library of Congress Subject Areas (17501)
- A General Works (344)
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  - AM Museums (General). Collectors and collecting (General) (15)
  - AS Academies and learned societies (General) (183)
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- B Philosophy. Psychology. Religion (238)
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- C Auxiliary Sciences of History (29)
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- D History General and Old World (85)
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- F History United States, Canada, Latin America (2)
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- G Geography. Anthropology. Recreation (253)
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- H Social Sciences (4630)
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- L Education (9301)
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- M Music and Books on Music (18)
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- N Fine Arts (335)
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- Q Science (1687)
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- R Medicine (759)
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- S Agriculture (145)
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- T Technology (1780)
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  - TK Electrical engineering. Electronics Nuclear engineering (127)
  - TL Motor vehicles. Aeronautics. Astronautics (25)
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  - TR Photography (57)
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  - TT Handicrafts Arts and crafts (39)
  - TX Home economics (58)
- U Military Science (6)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (145)
  - Z004 Books. Writing. Paleography (22)
  - Z665 Library Science. Information Science (60)
  - Z719 Libraries (General) (47)
  - ZA Information resources (50)
    - ZA4050 Electronic information resources (20)
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