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Library of Congress Subject Areas (3685)
- A General Works (34)
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  - AM Museums (General). Collectors and collecting (General) (6)
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- B Philosophy. Psychology. Religion (113)
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- D History General and Old World (65)
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- E History America (6)
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- F History United States, Canada, Latin America (2)
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- G Geography. Anthropology. Recreation (57)
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- H Social Sciences (1015)
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- L Education (888)
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- M Music and Books on Music (513)
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- N Fine Arts (605)
  - N Visual arts (General) For photography, see TR (376)
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- P Language and Literature (194)
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- Q Science (392)
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- R Medicine (267)
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- S Agriculture (44)
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- T Technology (444)
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  - TR Photography (246)
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- U Military Science (1)
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- Z Bibliography. Library Science. Information Resources (45)
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  - ZA Information resources (22)
    - ZA4050 Electronic information resources (17)
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