- Aberdein, Robert, author1
- Abrahams, R. (Robert), 1861-1935 author1
- Abrams, Albert, 1863-19243
- Abrams, Albert, 1863-1924 author1
- Abrams, Albert, 1863-1924, author2
- Abreu, José Benicio de.1
- Academia Nacional de Medicina de México, author.1
- Academia Nacional de Medicina de México.1
- Academy of Medicine of Cincinnati, author.2
- Academy of Medicine of Cincinnati.1
- Academy of Natural Sciences of Philadelphia, author.1
- Academy of Natural Sciences of Philadelphia.1
- Académie de médecine (France), author.1
- Acauan, Manuel Marques da Silva.1
- Acevedo, Agustin, author1
- Ackermann, Theodor, 1825-1896, author1
- Acland, Henry W. (Henry Wentworth), 1815-19001
- Acosta, Enrique, (Physician), author1
- Acton, William, 1813-18756
- Acuña, Jose Gregorio.1