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Library of Congress Subject Areas (991)
- A General Works (5)
  - AC Collections. Series. Collected works (2)
  - AI Indexes (General) (1)
  - AZ History of Scholarship The Humanities (2)
- B Philosophy. Psychology. Religion (1)
  - B Philosophy (General) (1)
- C Auxiliary Sciences of History (1)
  - CT Biography (1)
- G Geography. Anthropology. Recreation (17)
  - G Geography (General) (2)
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- H Social Sciences (580)
  - H Social Sciences (General) (240)
  - HB Economic Theory (21)
  - HC Economic History and Conditions (116)
  - HD Industries. Land use. Labor (1)
  - HE Transportation and Communications (156)
  - HF Commerce (2)
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  - HJ Public Finance (10)
- J Political Science (2)
  - J General legislative and executive papers (2)
- K Law (72)
  - K Law (General) (72)
- Q Science (69)
  - Q Science (General) (69)
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- S Agriculture (2)
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- T Technology (188)
  - T Technology (General) (2)
  - TA Engineering (General). Civil engineering (General) (14)
  - TD Environmental technology. Sanitary engineering (68)
  - TF Railroad engineering and operation (3)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (2)
  - TN Mining engineering. Metallurgy (1)
  - TP Chemical technology (92)
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  - TT Handicrafts Arts and crafts (6)
  - TX Home economics (3)
- Z Bibliography. Library Science. Information Resources (56)
  - Z665 Library Science. Information Science (1)
  - Z719 Libraries (General) (55)

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