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Library of Congress Subject Areas (51)
- A General Works (17)
  - AC Collections. Series. Collected works (17)
- H Social Sciences (30)
  - H Social Sciences (General) (11)
  - HA Statistics (1)
  - HB Economic Theory (11)
  - HC Economic History and Conditions (5)
  - HD Industries. Land use. Labor (1)
  - HF Commerce (6)
  - HG Finance (5)
  - HJ Public Finance (4)
  - HN Social history and conditions. Social problems. Social reform (8)
- T Technology (4)
  - T Technology (General) (4)
  - TA Engineering (General). Civil engineering (General) (3)
  - TS Manufactures (1)
- V Naval Science (3)
  - V Naval Science (General) (3)