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Library of Congress Subject Areas (9027)
- A General Works (814)
  - AC Collections. Series. Collected works (1)
  - AS Academies and learned societies (General) (2)
  - Food and Nutrition (811)
    - Food (381)
      - Breastmilk (56)
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- B Philosophy. Psychology. Religion (22)
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- G Geography. Anthropology. Recreation (1014)
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- H Social Sciences (32)
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- L Education (54)
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- Q Science (1036)
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- R Medicine (5445)
  - Medical Electronics (1100)
    - Biomedical Engineering (470)
    - Clinical Engineering (608)
  - Midwifery (1064)
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    - midwifery care (338)
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    - RC0254 Neoplasms. Tumors. Oncology (including Cancer) (1)
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  - RK Dentistry (1462)
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  - RT Nursing (1486)
  - RV Botanic, Thomsonian, and eclectic medicine (3)
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- S Agriculture (4)
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- T Technology (587)
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  - TA Engineering (General). Civil engineering (General) (3)
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- Z Bibliography. Library Science. Information Resources (89)
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