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Library of Congress Subject Areas (594)
- B Philosophy. Psychology. Religion (19)
  - B Philosophy (General) (1)
  - BC Logic (2)
  - BF Psychology (15)
  - BH Aesthetics (1)
  - BL Religion (1)
- G Geography. Anthropology. Recreation (2)
  - GC Oceanography (2)
- H Social Sciences (49)
  - H Social Sciences (General) (13)
  - HB Economic Theory (5)
  - HC Economic History and Conditions (3)
  - HD Industries. Land use. Labor (14)
    - HD28 Management. Industrial Management (6)
    - HD61 Risk Management (1)
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  - HM Sociology (6)
  - HN Social history and conditions. Social problems. Social reform (10)
  - HQ The family. Marriage. Woman (1)
  - HS Societies secret benevolent etc (1)
  - HT Communities. Classes. Races (1)
  - HX Socialism. Communism. Anarchism (1)
- J Political Science (1)
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- L Education (36)
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- N Fine Arts (1)
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- P Language and Literature (1)
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- Q Science (275)
  - Q Science (General) (204)
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  - QD Chemistry (71)
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    - QH301 Biology (5)
  - QK Botany (134)
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  - QP Physiology (4)
  - QR Microbiology (31)
- R Medicine (443)
  - R Medicine (General) (331)
  - RA Public aspects of medicine (63)
    - RA0421 Public health. Hygiene. Preventive Medicine (40)
  - RB Pathology (3)
  - RC Internal medicine (15)
    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (1)
  - RD Surgery (1)
  - RG Gynecology and obstetrics (4)
  - RJ Pediatrics (2)
  - RL Dermatology (24)
  - RM Therapeutics. Pharmacology (69)
  - RS Pharmacy and materia medica (222)
  - RT Nursing (3)
  - RV Botanic, Thomsonian, and eclectic medicine (138)
  - RZ Other systems of medicine (21)
- S Agriculture (11)
  - S Agriculture (General) (2)
  - SB Plant culture (8)
  - SF Animal culture (1)
  - SH Aquaculture. Fisheries. Angling (1)
- T Technology (39)
  - T Technology (General) (29)
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  - TP Chemical technology (8)
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