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Library of Congress Subject Areas (6086)
- A General Works (907)
  - AC Collections. Series. Collected works (300)
  - AI Indexes (General) (620)
  - AM Museums (General). Collectors and collecting (General) (6)
- B Philosophy. Psychology. Religion (193)
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- G Geography. Anthropology. Recreation (130)
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- H Social Sciences (211)
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    - HD28 Management. Industrial Management (68)
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  - HV Social pathology. Social and public welfare (77)
- L Education (229)
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- Q Science (482)
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- R Medicine (5248)
  - R Medicine (General) (3048)
  - RA Public aspects of medicine (749)
    - RA0421 Public health. Hygiene. Preventive Medicine (437)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (22)
  - RB Pathology (32)
  - RC Internal medicine (674)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (174)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (222)
    - RC1200 Sports Medicine (5)
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  - RG Gynecology and obstetrics (197)
  - RJ Pediatrics (253)
    - RJ101 Child Health. Child health services (23)
  - RK Dentistry (513)
  - RL Dermatology (109)
  - RM Therapeutics. Pharmacology (585)
  - RS Pharmacy and materia medica (480)
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  - RZ Other systems of medicine (192)
- S Agriculture (4)
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- T Technology (42)
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  - TD Environmental technology. Sanitary engineering (30)
  - TH Building construction (4)
  - TL Motor vehicles. Aeronautics. Astronautics (2)
- Z Bibliography. Library Science. Information Resources (91)
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  - ZA Information resources (69)
    - ZA4050 Electronic information resources (61)
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