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Library of Congress Subject Areas (652)
- B Philosophy. Psychology. Religion (152)
  - B Philosophy (General) (14)
  - BF Psychology (137)
  - BJ Ethics (2)
- D History General and Old World (4)
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- G Geography. Anthropology. Recreation (8)
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- H Social Sciences (62)
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    - HD28 Management. Industrial Management (2)
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- L Education (86)
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  - LC Special aspects of education (8)
- M Music and Books on Music (4)
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- N Fine Arts (7)
  - N Visual arts (General) For photography, see TR (2)
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- R Medicine (39)
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- T Technology (227)
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  - TR Photography (47)
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  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (22)
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