- Academy of Medicine of Cincinnati, author.2
- Academy of Medicine of Cincinnati.1
- Academy of Medicine of Philadelphia.2
- Academy of Natural Sciences of Philadelphia, author.2
- Academy of Natural Sciences of Philadelphia.1
- Académie de médecine (France)2
- Acauan, Manuel Marques da Silva.1
- Accum, Friedrich Christian, 1769-18385
- Acevedo, Agustin, author1
- Ackerley, G. (George)1
- Ackley, H. A.1
- Acosta, Enrique, (Physician), author1
- Acton, William, 1813-18758
- Acuña, Jose Gregorio.1
- Adalid y Castillo, Julio, author1
- Adami, J. George (John George), 1862-192618
- Adami, J. George (John George), 1862-1926, author1
- Adams Nervine Asylum, author.7
- Adams Nervine Asylum.1
- Adams, A. E. (Alpheus Eli), author1