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Library of Congress Subject Areas (4085)
- A General Works (597)
  - AC Collections. Series. Collected works (508)
  - AI Indexes (General) (8)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (42)
  - AZ History of Scholarship The Humanities (41)
- G Geography. Anthropology. Recreation (19)
  - G Geography (General) (6)
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- H Social Sciences (145)
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    - HD28 Management. Industrial Management (2)
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- K Law (40)
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- L Education (1112)
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    - LB1501 Primary Education (2)
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  - LC Special aspects of education (3)
    - LC5201 Education extension. Adult education. Continuing education (1)
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- M Music and Books on Music (1)
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- N Fine Arts (10)
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- Q Science (204)
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    - QA75 Electronic computers. Computer science (2)
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- R Medicine (1)
  - R Medicine (General) (1)
- S Agriculture (1)
  - S Agriculture (General) (1)
- T Technology (2012)
  - T Technology (General) (960)
    - T201 Patents. Trademarks (18)
  - TA Engineering (General). Civil engineering (General) (391)
  - TC Hydraulic engineering. Ocean engineering (3)
  - TD Environmental technology. Sanitary engineering (9)
  - TE Highway engineering. Roads and pavements (1)
  - TH Building construction (9)
  - TJ Mechanical engineering and machinery (211)
  - TK Electrical engineering. Electronics Nuclear engineering (307)
  - TR Photography (3)
  - TS Manufactures (145)
- U Military Science (2)
  - U Military Science (General) (2)
- Z Bibliography. Library Science. Information Resources (43)
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    - ZA4050 Electronic information resources (7)
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