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- Library of Congress Subject Areas (21615)
- A General Works (76)
- E History America (251)
- H Social Sciences (4654)
- J Political Science (1246)
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- L Education (1280)
- N Fine Arts (327)
- P Language and Literature (1292)
- Q Science (6354)
- R Medicine (2930)
- S Agriculture (90)
- T Technology (1469)
- U Military Science (54)
- V Naval Science (8)
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