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Library of Congress Subject Areas (153)
- Q Science (16)
  - Q Science (General) (14)
  - QD Chemistry (1)
  - QM Human anatomy (1)
  - QR Microbiology (5)
    - QR180 Immunology (3)
    - QR355 Virology (1)
- R Medicine (137)
  - R Medicine (General) (54)
  - RS Pharmacy and materia medica (17)
  - RT Nursing (49)
  - RZ Other systems of medicine (17)