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Library of Congress Subject Areas (14714)
- A General Works (271)
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- B Philosophy. Psychology. Religion (207)
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- C Auxiliary Sciences of History (25)
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- F History United States, Canada, Latin America (2)
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- G Geography. Anthropology. Recreation (194)
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- M Music and Books on Music (14)
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- N Fine Arts (285)
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- R Medicine (604)
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- S Agriculture (98)
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- T Technology (1411)
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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 (121)
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  - Z719 Libraries (General) (43)
  - ZA Information resources (46)
    - ZA4050 Electronic information resources (19)
    - ZA4450 Databases (13)