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Library of Congress Subject Areas (28271)
- A General Works (68)
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- B Philosophy. Psychology. Religion (995)
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- C Auxiliary Sciences of History (43)
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- L Education (4363)
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- M Music and Books on Music (70)
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- N Fine Arts (94)
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- Q Science (3377)
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- S Agriculture (150)
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- T Technology (2260)
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- U Military Science (48)
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- V Naval Science (3)
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