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Library of Congress Subject Areas (21973)
- A General Works (258)
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- B Philosophy. Psychology. Religion (489)
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- C Auxiliary Sciences of History (3)
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- G Geography. Anthropology. Recreation (476)
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- L Education (2662)
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- M Music and Books on Music (10)
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- Q Science (4183)
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- R Medicine (197)
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- T Technology (13376)
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  - TP Chemical technology (3408)
  - TR Photography (10)
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- U Military Science (15)
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- Z Bibliography. Library Science. Information Resources (121)
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