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Library of Congress Subject Areas (650)
- G Geography. Anthropology. Recreation (1)
  - GE Environmental Sciences (1)
- H Social Sciences (242)
  - H Social Sciences (General) (12)
  - HA Statistics (2)
  - HB Economic Theory (220)
  - HC Economic History and Conditions (7)
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  - HJ Public Finance (3)
  - HN Social history and conditions. Social problems. Social reform (1)
- K Law (176)
  - K Law (General) (176)
- L Education (2)
  - L Education (General) (1)
  - LT Textbooks (1)
- P Language and Literature (1)
  - PE English (1)
- Q Science (70)
  - Q Science (General) (3)
  - QA Mathematics (67)
    - QA75 Electronic computers. Computer science (66)
- S Agriculture (113)
  - S Agriculture (General) (110)
  - SB Plant culture (6)
- T Technology (47)
  - T Technology (General) (44)
  - TA Engineering (General). Civil engineering (General) (2)
  - TN Mining engineering. Metallurgy (1)