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Library of Congress Subject Areas (395)
- A General Works (223)
  - AC Collections. Series. Collected works (220)
  - AI Indexes (General) (4)
  - AS Academies and learned societies (General) (1)
- B Philosophy. Psychology. Religion (2)
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  - BJ Ethics (1)
- C Auxiliary Sciences of History (11)
  - CB History of civilization (1)
  - CS Genealogy (10)
- G Geography. Anthropology. Recreation (9)
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  - GF Human ecology. Anthropogeography (6)
- H Social Sciences (86)
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  - HB Economic Theory (36)
  - HC Economic History and Conditions (20)
  - HD Industries. Land use. Labor (27)
    - HD28 Management. Industrial Management (23)
    - HD61 Risk Management (5)
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- L Education (2)
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- Q Science (4)
  - Q Science (General) (4)
- R Medicine (8)
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    - RA0421 Public health. Hygiene. Preventive Medicine (1)
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- T Technology (50)
  - T Technology (General) (48)
  - TA Engineering (General). Civil engineering (General) (1)
  - TP Chemical technology (1)