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Library of Congress Subject Areas (11540)
- A General Works (129)
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  - AM Museums (General). Collectors and collecting (General) (3)
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- B Philosophy. Psychology. Religion (109)
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- C Auxiliary Sciences of History (9)
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- D History General and Old World (18)
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- E History America (12)
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- F History United States, Canada, Latin America (3)
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- G Geography. Anthropology. Recreation (37)
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- H Social Sciences (4329)
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- J Political Science (676)
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- K Law (1452)
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- L Education (403)
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- M Music and Books on Music (12)
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- N Fine Arts (26)
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- Q Science (1296)
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- R Medicine (3031)
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- S Agriculture (40)
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- T Technology (1048)
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  - TA Engineering (General). Civil engineering (General) (411)
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  - TH Building construction (31)
  - TJ Mechanical engineering and machinery (175)
  - TK Electrical engineering. Electronics Nuclear engineering (12)
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  - TN Mining engineering. Metallurgy (11)
  - TP Chemical technology (3)
  - TR Photography (6)
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- U Military Science (54)
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- V Naval Science (104)
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  - VM Naval architecture. Shipbuilding. Marine engineering (80)
- Z Bibliography. Library Science. Information Resources (222)
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  - ZA Information resources (71)
    - ZA4050 Electronic information resources (38)
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