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Library of Congress Subject Areas (1171)
- A General Works (31)
  - AC Collections. Series. Collected works (13)
  - AI Indexes (General) (7)
  - AM Museums (General). Collectors and collecting (General) (3)
  - AS Academies and learned societies (General) (13)
  - AZ History of Scholarship The Humanities (10)
- B Philosophy. Psychology. Religion (4)
  - B Philosophy (General) (1)
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    - BV1460 Religious Education (1)
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- C Auxiliary Sciences of History (2)
  - C Auxiliary sciences of history (General) (2)
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    - CD921 Archives (1)
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- D History General and Old World (1)
  - D History (General) (1)
- E History America (2)
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- F History United States, Canada, Latin America (3)
  - F001 United States local history (3)
- G Geography. Anthropology. Recreation (4)
  - G Geography (General) (2)
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- H Social Sciences (476)
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  - HB Economic Theory (237)
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  - HN Social history and conditions. Social problems. Social reform (24)
  - HQ The family. Marriage. Woman (1)
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  - HV Social pathology. Social and public welfare (24)
  - HX Socialism. Communism. Anarchism (1)
- J Political Science (42)
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- K Law (119)
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    - KDC Scotland (1)
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- L Education (252)
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    - LB1501 Primary Education (45)
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  - LC Special aspects of education (13)
    - LC5201 Education extension. Adult education. Continuing education (2)
  - LD Individual institutions (United States) (2)
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  - LG Individual institutions (Asia. Africa) (2)
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- M Music and Books on Music (2)
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- N Fine Arts (2)
  - N Visual arts (General) For photography, see TR (1)
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- P Language and Literature (83)
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- Q Science (62)
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- R Medicine (3)
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- S Agriculture (138)
  - S Agriculture (General) (134)
  - SB Plant culture (23)
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  - SH Aquaculture. Fisheries. Angling (4)
- T Technology (13)
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  - TA Engineering (General). Civil engineering (General) (1)
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  - TX Home economics (2)
- U Military Science (1)
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- V Naval Science (15)
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  - VM Naval architecture. Shipbuilding. Marine engineering (2)
- Z Bibliography. Library Science. Information Resources (6)
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  - Z665 Library Science. Information Science (3)
  - Z719 Libraries (General) (4)
  - ZA Information resources (5)
    - ZA4050 Electronic information resources (3)
    - ZA4450 Databases (4)