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- Library of Congress Subject Areas (24552)
- A General Works (89)
- E History America (263)
- H Social Sciences (5413)
- J Political Science (1449)
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- L Education (1515)
- N Fine Arts (390)
- P Language and Literature (1463)
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- R Medicine (3426)
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- T Technology (1766)
- U Military Science (58)
- V Naval Science (8)
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