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Library of Congress Subject Areas (404)
- A General Works (2)
  - AS Academies and learned societies (General) (2)
- B Philosophy. Psychology. Religion (2)
  - BP Islam. Bahaism. Theosophy, etc (2)
- C Auxiliary Sciences of History (3)
  - CC Archaeology (3)
- D History General and Old World (15)
  - D History (General) (2)
    - D204 Modern History (1)
  - DT Africa (15)
- G Geography. Anthropology. Recreation (52)
  - G Geography (General) (16)
  - GA Mathematical geography. Cartography (2)
  - GB Physical geography (2)
  - GE Environmental Sciences (33)
  - GF Human ecology. Anthropogeography (2)
  - GN Anthropology (3)
  - GT Manners and customs (1)
- H Social Sciences (100)
  - H Social Sciences (General) (64)
  - HB Economic Theory (14)
  - HD Industries. Land use. Labor (34)
    - HD28 Management. Industrial Management (20)
    - HD61 Risk Management (10)
  - HF Commerce (13)
    - HF5601 Accounting (1)
  - HG Finance (2)
  - HM Sociology (11)
  - HN Social history and conditions. Social problems. Social reform (5)
  - HQ The family. Marriage. Woman (2)
  - HT Communities. Classes. Races (7)
- J Political Science (5)
  - JF Political institutions (General) (1)
  - JN Political institutions (Europe) (1)
    - JN101 Great Britain (1)
  - JQ Political institutions Asia (1)
  - JS Local government Municipal government (2)
  - JZ International relations (1)
- K Law (12)
  - K Law (General) (11)
  - KD England and Wales (1)
- L Education (17)
  - L Education (General) (6)
  - LB Theory and practice of education (12)
    - LB2300 Higher Education (11)
    - LB2361 Curriculum (4)
  - LC Special aspects of education (5)
    - LC5201 Education extension. Adult education. Continuing education (2)
  - LF Individual institutions (Europe) (1)
- Q Science (113)
  - Q Science (General) (12)
  - QA Mathematics (3)
    - QA75 Electronic computers. Computer science (2)
  - QC Physics (1)
  - QD Chemistry (4)
  - QE Geology (1)
  - QH Natural history (10)
    - QH301 Biology (4)
  - QK Botany (15)
  - QL Zoology (67)
  - QP Physiology (7)
  - QR Microbiology (6)
- R Medicine (7)
  - R Medicine (General) (2)
  - RA Public aspects of medicine (2)
    - RA0421 Public health. Hygiene. Preventive Medicine (2)
  - RM Therapeutics. Pharmacology (2)
  - RZ Other systems of medicine (1)
- S Agriculture (195)
  - S Agriculture (General) (170)
  - SB Plant culture (16)
  - SD Forestry (4)
  - SF Animal culture (29)
  - SH Aquaculture. Fisheries. Angling (1)
- T Technology (12)
  - T Technology (General) (8)
  - TA Engineering (General). Civil engineering (General) (1)
  - TD Environmental technology. Sanitary engineering (1)
  - TS Manufactures (2)