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Library of Congress Subject Areas (18997)
- A General Works (387)
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  - AM Museums (General). Collectors and collecting (General) (16)
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- B Philosophy. Psychology. Religion (254)
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- C Auxiliary Sciences of History (31)
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- G Geography. Anthropology. Recreation (284)
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- M Music and Books on Music (18)
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- N Fine Arts (358)
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- Q Science (1813)
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- R Medicine (774)
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- S Agriculture (168)
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- T Technology (1927)
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  - TX Home economics (64)
- U Military Science (6)
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- V Naval Science (1)
  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (161)
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  - ZA Information resources (56)
    - ZA4050 Electronic information resources (22)
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