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Library of Congress Subject Areas (329)
- H Social Sciences (17)
  - HB Economic Theory (2)
  - HD Industries. Land use. Labor (15)
    - HD28 Management. Industrial Management (15)
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    - HF5601 Accounting (1)
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- Q Science (9)
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    - QH301 Biology (2)
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  - QR Microbiology (3)
- S Agriculture (267)
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  - SH Aquaculture. Fisheries. Angling (266)
- T Technology (55)
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  - TC Hydraulic engineering. Ocean engineering (1)
  - TD Environmental technology. Sanitary engineering (1)
  - TJ Mechanical engineering and machinery (4)
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  - TL Motor vehicles. Aeronautics. Astronautics (5)
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  - TX Home economics (39)