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Library of Congress Subject Areas (13464)
- A General Works (258)
  - AC Collections. Series. Collected works (59)
  - AI Indexes (General) (49)
  - AM Museums (General). Collectors and collecting (General) (11)
  - AS Academies and learned societies (General) (158)
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- B Philosophy. Psychology. Religion (194)
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- C Auxiliary Sciences of History (23)
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- D History General and Old World (69)
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- F History United States, Canada, Latin America (1)
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- G Geography. Anthropology. Recreation (183)
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- L Education (7104)
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- M Music and Books on Music (12)
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- N Fine Arts (272)
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- Q Science (1265)
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- R Medicine (546)
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- S Agriculture (86)
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- T Technology (1227)
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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 (112)
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  - Z719 Libraries (General) (43)
  - ZA Information resources (42)
    - ZA4050 Electronic information resources (18)
    - ZA4450 Databases (12)