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Library of Congress Subject Areas (7076)
- A General Works (56)
  - AC Collections. Series. Collected works (20)
  - AI Indexes (General) (26)
  - AM Museums (General). Collectors and collecting (General) (1)
  - AS Academies and learned societies (General) (11)
- B Philosophy. Psychology. Religion (222)
  - B Philosophy (General) (12)
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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 (4)
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- H Social Sciences (73)
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    - HD28 Management. Industrial Management (9)
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- J Political Science (5)
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- K Law (1)
  - K Law (General) (1)
- L Education (187)
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    - LB1501 Primary Education (2)
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  - LC Special aspects of education (3)
    - LC5201 Education extension. Adult education. Continuing education (2)
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- Q Science (309)
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    - QA75 Electronic computers. Computer science (22)
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  - QH Natural history (38)
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  - QM Human anatomy (73)
  - QP Physiology (82)
  - QR Microbiology (69)
    - QR180 Immunology (4)
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- R Medicine (6264)
  - R Medicine (General) (1390)
  - RA Public aspects of medicine (300)
    - RA0421 Public health. Hygiene. Preventive Medicine (227)
    - RA1001 Forensic Medicine. Medical jurisprudence. Legal medicine (2)
  - RB Pathology (20)
  - RC Internal medicine (145)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (16)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (16)
    - RC1200 Sports Medicine (5)
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  - RT Nursing (747)
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  - RX Homeopathy (4)
  - RZ Other systems of medicine (117)
  - RH Basic Medical Sciences (212)
    - RH1001 Biochemistry & Genetics (186)
  - RI Heart (61)
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    - RN1001 Public Health (264)
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    - RN1005 Health Sciences in Nutrition (275)
    - RN1006 Health and food safety (215)
    - RN1007 MPH (30)
  - RP Paramedical (772)
    - RP101 Operating Room (201)
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    - RP105 Biotechnology (221)
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- S Agriculture (7)
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- T Technology (3)
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  - TD Environmental technology. Sanitary engineering (2)
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  - V Naval Science (General) (1)
- Z Bibliography. Library Science. Information Resources (7)
  - Z665 Library Science. Information Science (7)