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Library of Congress Subject Areas (55)
- H Social Sciences (6)
  - HB Economic Theory (1)
  - HD Industries. Land use. Labor (4)
    - HD28 Management. Industrial Management (4)
  - HF Commerce (1)
  - HG Finance (2)
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  - HN Social history and conditions. Social problems. Social reform (1)
- Q Science (6)
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  - QL Zoology (2)
  - QP Physiology (2)
  - QR Microbiology (2)
- S Agriculture (41)
  - SF Animal culture (2)
  - SH Aquaculture. Fisheries. Angling (40)
- T Technology (11)
  - TA Engineering (General). Civil engineering (General) (1)
  - TC Hydraulic engineering. Ocean engineering (1)
  - TD Environmental technology. Sanitary engineering (1)
  - TJ Mechanical engineering and machinery (1)
  - TK Electrical engineering. Electronics Nuclear engineering (1)
  - TP Chemical technology (5)
  - TS Manufactures (1)
  - TX Home economics (5)