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Library of Congress Subject Areas (3344)
- D History General and Old World (1)
  - DS Asia (1)
- G Geography. Anthropology. Recreation (279)
  - G Geography (General) (8)
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- H Social Sciences (161)
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- N Fine Arts (5)
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- Q Science (742)
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- R Medicine (30)
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- S Agriculture (1655)
  - S Agriculture (General) (473)
  - SB Plant culture (705)
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- T Technology (364)
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