- Library of Congress Subject Areas (12776)
- R Medicine (2495)
- R Medicine (General) (270)
- RB Pathology (5)
- RC Internal medicine (11)
- RD Surgery (4)
- RE Ophthalmology (1)
- RG Midwifery (430)
- RJ Pediatrics (14)
- RK Dentistry (1)
- RL Dermatology (3)
- RT Nursing (1943)
- R Medicine (2495)
Number of items at this level: 0.
Up a level