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Library of Congress Subject Areas (17574)
- A General Works (210)
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- B Philosophy. Psychology. Religion (392)
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- C Auxiliary Sciences of History (1)
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- G Geography. Anthropology. Recreation (409)
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- H Social Sciences (2115)
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- L Education (2098)
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- M Music and Books on Music (10)
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- Q Science (3080)
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- R Medicine (137)
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- S Agriculture (87)
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- T Technology (10821)
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- Z Bibliography. Library Science. Information Resources (101)
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