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Library of Congress Subject Areas (16566)
- A General Works (313)
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  - AM Museums (General). Collectors and collecting (General) (14)
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- B Philosophy. Psychology. Religion (229)
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- C Auxiliary Sciences of History (28)
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- F History United States, Canada, Latin America (2)
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- G Geography. Anthropology. Recreation (231)
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- L Education (8729)
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- M Music and Books on Music (17)
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- N Fine Arts (322)
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- R Medicine (639)
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- S Agriculture (129)
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- T Technology (1667)
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- U Military Science (6)
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- V Naval Science (1)
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- Z Bibliography. Library Science. Information Resources (139)
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  - ZA Information resources (49)
    - ZA4050 Electronic information resources (19)
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