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Library of Congress Subject Areas (16678)
- A General Works (70)
  - AC Collections. Series. Collected works (19)
  - AI Indexes (General) (4)
  - AM Museums (General). Collectors and collecting (General) (4)
  - AS Academies and learned societies (General) (38)
  - AZ History of Scholarship The Humanities (9)
- B Philosophy. Psychology. Religion (386)
  - B Philosophy (General) (34)
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    - BV1460 Religious Education (2)
- C Auxiliary Sciences of History (16)
  - C Auxiliary sciences of history (General) (1)
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- D History General and Old World (103)
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    - D839 Post-war History, 1945 on (1)
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- G Geography. Anthropology. Recreation (869)
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- H Social Sciences (3440)
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  - HQ The family. Marriage. Woman (110)
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- J Political Science (58)
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- K Law (37)
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- L Education (8914)
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- M Music and Books on Music (227)
  - M Music (90)
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- N Fine Arts (458)
  - N Visual arts (General) For photography, see TR (93)
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- P Language and Literature (1447)
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  - PQ Romance literatures (32)
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- Q Science (3062)
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- R Medicine (606)
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  - RC Internal medicine (553)
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- S Agriculture (65)
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- T Technology (792)
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  - TR Photography (1)
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  - TT Handicrafts Arts and crafts (28)
  - TX Home economics (37)
- Z Bibliography. Library Science. Information Resources (313)
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  - ZA Information resources (32)
    - ZA4050 Electronic information resources (11)
    - ZA4450 Databases (6)