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Library of Congress Subject Areas (3195)
- A General Works (18)
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  - AS Academies and learned societies (General) (1)
- B Philosophy. Psychology. Religion (12)
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- G Geography. Anthropology. Recreation (1)
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- L Education (66)
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- Q Science (79)
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- R Medicine (2138)
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    - RA0421 Public health. Hygiene. Preventive Medicine (319)
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  - RK Dentistry (156)
  - RM Therapeutics. Pharmacology (3)
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  - RV Botanic, Thomsonian, and eclectic medicine (2)
  - RZ Other systems of medicine (59)
- S Agriculture (1)
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- T Technology (954)
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  - TD Environmental technology. Sanitary engineering (944)
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  - TP Chemical technology (19)
- Z Bibliography. Library Science. Information Resources (9)
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