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Library of Congress Subject Areas (12909)
- A General Works (45)
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- B Philosophy. Psychology. Religion (1347)
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- C Auxiliary Sciences of History (68)
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- G Geography. Anthropology. Recreation (210)
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- M Music and Books on Music (72)
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- Q Science (3758)
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- R Medicine (966)
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- T Technology (2260)
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- Z Bibliography. Library Science. Information Resources (144)
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