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Library of Congress Subject Areas (5889)
- A General Works (20)
  - AC Collections. Series. Collected works (15)
  - AI Indexes (General) (4)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (2)
- B Philosophy. Psychology. Religion (199)
  - B Philosophy (General) (2)
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- C Auxiliary Sciences of History (1)
  - C Auxiliary sciences of history (General) (1)
- D History General and Old World (1)
  - D History (General) (1)
- G Geography. Anthropology. Recreation (2)
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- H Social Sciences (67)
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    - HD28 Management. Industrial Management (8)
    - HD61 Risk Management (4)
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- L Education (119)
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    - LC5201 Education extension. Adult education. Continuing education (2)
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- Q Science (256)
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  - QM Human anatomy (61)
  - QP Physiology (69)
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    - QR180 Immunology (4)
    - QR355 Virology (2)
- R Medicine (5261)
  - R Medicine (General) (1241)
  - RA Public aspects of medicine (139)
    - RA0421 Public health. Hygiene. Preventive Medicine (126)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (1)
  - RB Pathology (13)
  - RC Internal medicine (113)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (11)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (10)
  - RD Surgery (90)
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  - RG Gynecology and obstetrics (160)
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  - RK Dentistry (862)
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  - RM Therapeutics. Pharmacology (18)
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  - RT Nursing (642)
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  - RZ Other systems of medicine (106)
  - RH Basic Medical Sciences (200)
    - RH1001 Biochemistry & Genetics (176)
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    - RN1005 Health Sciences in Nutrition (228)
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    - RN1007 MPH (26)
  - RP Paramedical (660)
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    - RP102 Anesthesiology (97)
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    - RP104 Medical emergencies (37)
    - RP105 Biotechnology (185)
  - RQ Parasitology (9)
- S Agriculture (6)
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- T Technology (3)
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  - TD Environmental technology. Sanitary engineering (2)
- Z Bibliography. Library Science. Information Resources (7)
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