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Library of Congress Subject Areas (1797)
- A General Works (37)
  - AC Collections. Series. Collected works (2)
  - AI Indexes (General) (29)
  - AS Academies and learned societies (General) (7)
- C Auxiliary Sciences of History (1)
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- G Geography. Anthropology. Recreation (5)
  - G Geography (General) (2)
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  - GV Recreation Leisure (1)
- H Social Sciences (525)
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  - HB Economic Theory (257)
  - HC Economic History and Conditions (84)
  - HD Industries. Land use. Labor (41)
    - HD28 Management. Industrial Management (31)
    - HD61 Risk Management (1)
  - HE Transportation and Communications (7)
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  - HV Social pathology. Social and public welfare (3)
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- K Law (625)
  - K Law (General) (624)
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- L Education (89)
  - L Education (General) (66)
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    - LB1501 Primary Education (31)
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- Q Science (107)
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    - QA75 Electronic computers. Computer science (51)
    - QA76 Computer software (20)
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- R Medicine (3)
  - R Medicine (General) (1)
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    - RA0421 Public health. Hygiene. Preventive Medicine (2)
- S Agriculture (4)
  - S Agriculture (General) (1)
  - SF Animal culture (1)
  - SH Aquaculture. Fisheries. Angling (3)
- T Technology (508)
  - T Technology (General) (212)
    - T201 Patents. Trademarks (1)
  - TA Engineering (General). Civil engineering (General) (297)
  - TC Hydraulic engineering. Ocean engineering (2)
  - TD Environmental technology. Sanitary engineering (52)
  - TE Highway engineering. Roads and pavements (53)
  - TF Railroad engineering and operation (18)
  - TG Bridge engineering (9)
  - TH Building construction (76)
  - TJ Mechanical engineering and machinery (4)
  - TL Motor vehicles. Aeronautics. Astronautics (2)
  - TP Chemical technology (1)
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- Z Bibliography. Library Science. Information Resources (2)
  - Z719 Libraries (General) (1)
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    - ZA4050 Electronic information resources (1)