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Library of Congress Subject Areas (5781)
- 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 (198)
  - B Philosophy (General) (2)
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  - BL Religion (188)
- 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 (1)
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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 (118)
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    - LC5201 Education extension. Adult education. Continuing education (2)
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- Q Science (253)
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  - QM Human anatomy (61)
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    - QR180 Immunology (4)
    - QR355 Virology (2)
- R Medicine (5157)
  - R Medicine (General) (1212)
  - RA Public aspects of medicine (137)
    - RA0421 Public health. Hygiene. Preventive Medicine (124)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (1)
  - RB Pathology (10)
  - RC Internal medicine (101)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (11)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (8)
  - RD Surgery (87)
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  - RG Gynecology and obstetrics (158)
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    - RJ101 Child Health. Child health services (30)
  - RK Dentistry (858)
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  - RM Therapeutics. Pharmacology (18)
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  - RT Nursing (638)
  - RV Botanic, Thomsonian, and eclectic medicine (2)
  - RX Homeopathy (4)
  - RZ Other systems of medicine (105)
  - RH Basic Medical Sciences (197)
    - RH1001 Biochemistry & Genetics (174)
  - RI Heart (52)
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    - RN1001 Public Health (240)
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    - RN1004 Health Care Management (236)
    - RN1005 Health Sciences in Nutrition (226)
    - RN1006 Health and food safety (104)
    - RN1007 MPH (26)
  - RP Paramedical (659)
    - RP101 Operating Room (200)
    - RP102 Anesthesiology (97)
    - RP103 Laboratory Sciences (98)
    - RP104 Medical emergencies (37)
    - RP105 Biotechnology (184)
  - RQ Parasitology (7)
- 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)
  - Z665 Library Science. Information Science (7)