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Library of Congress Subject Areas (11617)
- A General Works (129)
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- B Philosophy. Psychology. Religion (110)
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- C Auxiliary Sciences of History (9)
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- D History General and Old World (18)
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- F History United States, Canada, Latin America (3)
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- G Geography. Anthropology. Recreation (37)
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- M Music and Books on Music (12)
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- N Fine Arts (26)
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- Q Science (1297)
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- R Medicine (3058)
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- S Agriculture (40)
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- T Technology (1054)
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- U Military Science (54)
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- V Naval Science (104)
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- Z Bibliography. Library Science. Information Resources (221)
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    - ZA4050 Electronic information resources (38)
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