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Library of Congress Subject Areas (24563)
- A General Works (28)
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- B Philosophy. Psychology. Religion (882)
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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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- M Music and Books on Music (65)
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- N Fine Arts (81)
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- Q Science (2996)
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- R Medicine (174)
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- U Military Science (42)
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