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Library of Congress Subject Areas (631)
- A General Works (3)
  - AS Academies and learned societies (General) (2)
  - AZ History of Scholarship The Humanities (1)
- B Philosophy. Psychology. Religion (13)
  - B Philosophy (General) (5)
  - BF Psychology (5)
  - BJ Ethics (2)
  - BP Islam. Bahaism. Theosophy, etc (2)
  - BR Christianity (1)
  - BS The Bible (1)
- C Auxiliary Sciences of History (14)
  - CC Archaeology (14)
- D History General and Old World (57)
  - D History (General) (4)
    - D204 Modern History (1)
  - DA Great Britain (7)
  - DL Northern Europe. Scandinavia (1)
  - DP Spain (1)
  - DS Asia (10)
  - DT Africa (40)
- G Geography. Anthropology. Recreation (89)
  - G Geography (General) (34)
  - GA Mathematical geography. Cartography (2)
  - GB Physical geography (2)
  - GE Environmental Sciences (63)
  - GF Human ecology. Anthropogeography (22)
  - GN Anthropology (23)
  - GT Manners and customs (1)
- H Social Sciences (177)
  - H Social Sciences (General) (137)
  - HB Economic Theory (20)
  - HD Industries. Land use. Labor (38)
    - HD28 Management. Industrial Management (20)
    - HD61 Risk Management (13)
  - HE Transportation and Communications (1)
  - HF Commerce (14)
    - HF5601 Accounting (1)
  - HG Finance (2)
  - HM Sociology (22)
  - HN Social history and conditions. Social problems. Social reform (11)
  - HQ The family. Marriage. Woman (2)
  - HT Communities. Classes. Races (12)
  - HV Social pathology. Social and public welfare (2)
  - HX Socialism. Communism. Anarchism (1)
- J Political Science (15)
  - JA Political science (General) (3)
  - JC Political theory (7)
  - JF Political institutions (General) (2)
  - JN Political institutions (Europe) (2)
    - JN101 Great Britain (1)
  - JQ Political institutions Asia (6)
  - JS Local government Municipal government (7)
  - JV Colonies and colonization. Emigration and immigration. International migration (2)
  - JX International law (1)
  - JZ International relations (1)
- K Law (13)
  - K Law (General) (11)
  - KD England and Wales (2)
- L Education (25)
  - L Education (General) (11)
  - LB Theory and practice of education (16)
    - LB2300 Higher Education (12)
    - LB2361 Curriculum (4)
  - LC Special aspects of education (8)
    - LC5201 Education extension. Adult education. Continuing education (5)
  - LF Individual institutions (Europe) (1)
- Q Science (147)
  - Q Science (General) (32)
  - QA Mathematics (5)
    - QA75 Electronic computers. Computer science (4)
  - QC Physics (1)
  - QD Chemistry (6)
  - QE Geology (1)
  - QH Natural history (13)
    - QH301 Biology (5)
  - QK Botany (22)
  - QL Zoology (67)
  - QP Physiology (8)
  - QR Microbiology (10)
- R Medicine (22)
  - R Medicine (General) (4)
  - RA Public aspects of medicine (16)
    - RA0421 Public health. Hygiene. Preventive Medicine (13)
  - RC Internal medicine (2)
    - RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry (1)
  - RM Therapeutics. Pharmacology (2)
  - RS Pharmacy and materia medica (1)
  - RZ Other systems of medicine (6)
- S Agriculture (333)
  - S Agriculture (General) (303)
  - SB Plant culture (24)
  - SD Forestry (15)
  - SF Animal culture (47)
  - SH Aquaculture. Fisheries. Angling (3)
- T Technology (25)
  - T Technology (General) (16)
  - TA Engineering (General). Civil engineering (General) (2)
  - TD Environmental technology. Sanitary engineering (6)
  - TN Mining engineering. Metallurgy (1)
  - TP Chemical technology (2)
  - TS Manufactures (2)