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Library of Congress Subject Areas (53541)
- A General Works (69)
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  - AI Indexes (General) (4)
  - AM Museums (General). Collectors and collecting (General) (5)
  - AS Academies and learned societies (General) (43)
  - AZ History of Scholarship The Humanities (4)
- B Philosophy. Psychology. Religion (3833)
  - B Philosophy (General) (164)
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    - BV1460 Religious Education (29)
- C Auxiliary Sciences of History (9)
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- D History General and Old World (8)
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- G Geography. Anthropology. Recreation (974)
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- H Social Sciences (10593)
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- J Political Science (47)
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- L Education (17403)
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- M Music and Books on Music (19)
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- N Fine Arts (529)
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- Q Science (3117)
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- R Medicine (8222)
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    - RC1200 Sports Medicine (52)
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  - RM Therapeutics. Pharmacology (1246)
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  - RX Homeopathy (2)
  - RZ Other systems of medicine (249)
- S Agriculture (73)
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- T Technology (4755)
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  - TA Engineering (General). Civil engineering (General) (1070)
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  - TH Building construction (241)
  - TJ Mechanical engineering and machinery (966)
  - TK Electrical engineering. Electronics Nuclear engineering (656)
  - TL Motor vehicles. Aeronautics. Astronautics (88)
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  - TR Photography (7)
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  - TX Home economics (66)
- U Military Science (3)
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- V Naval Science (14)
  - V Naval Science (General) (11)
  - VM Naval architecture. Shipbuilding. Marine engineering (3)
- X General Subject (605)
- Z Bibliography. Library Science. Information Resources (74)
  - Z004 Books. Writing. Paleography (7)
  - Z665 Library Science. Information Science (16)
  - Z719 Libraries (General) (9)
  - ZA Information resources (45)
    - ZA4050 Electronic information resources (22)
    - ZA4450 Databases (9)