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Library of Congress Subject Areas (24654)
- A General Works (28)
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- B Philosophy. Psychology. Religion (883)
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- C Auxiliary Sciences of History (9)
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- D History General and Old World (288)
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- G Geography. Anthropology. Recreation (1425)
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- J Political Science (1908)
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- M Music and Books on Music (65)
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- N Fine Arts (81)
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- Q Science (3002)
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- R Medicine (174)
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- S Agriculture (124)
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- T Technology (1923)
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  - TK Electrical engineering. Electronics Nuclear engineering (209)
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- U Military Science (42)
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- V Naval Science (2)
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- Z Bibliography. Library Science. Information Resources (127)
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