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Library of Congress Subject Areas (46386)
- A General Works (54)
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- B Philosophy. Psychology. Religion (3323)
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- C Auxiliary Sciences of History (8)
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- G Geography. Anthropology. Recreation (738)
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- L Education (15380)
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- M Music and Books on Music (16)
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- N Fine Arts (374)
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- Q Science (2590)
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- R Medicine (7414)
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- S Agriculture (63)
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- T Technology (3973)
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- U Military Science (1)
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- V Naval Science (14)
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  - VM Naval architecture. Shipbuilding. Marine engineering (3)
- X General Subject (261)
- Z Bibliography. Library Science. Information Resources (52)
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    - ZA4050 Electronic information resources (15)
    - ZA4450 Databases (4)