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Library of Congress Subject Areas (29700)
- A General Works (272)
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- B Philosophy. Psychology. Religion (655)
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- C Auxiliary Sciences of History (5)
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- D History General and Old World (68)
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- G Geography. Anthropology. Recreation (614)
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- H Social Sciences (4772)
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- J Political Science (247)
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- K Law (71)
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- L Education (3393)
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- M Music and Books on Music (12)
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- N Fine Arts (34)
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- Q Science (5898)
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- R Medicine (441)
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- S Agriculture (217)
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- T Technology (18231)
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  - TK Electrical engineering. Electronics Nuclear engineering (2542)
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- U Military Science (15)
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- V Naval Science (8)
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- Z Bibliography. Library Science. Information Resources (178)
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