- Abrams, Melinda K., author3
- Abt, Henry Edward, 1904-1962 author1
- Academy of Medicine of Cincinnati, author.2
- Academy of Medicine of Philadelphia.1
- Academy of Natural Sciences of Philadelphia, author.1
- Academy of Natural Sciences of Philadelphia.1
- Académie de médecine (France)1
- Accius, Jean, author3
- Accum, Friedrich Christian, 1769-18383
- Ackerley, G. (George)1
- Acland, Henry W. (Henry Wentworth), 1815-19001
- Acoca, Leslie, author1
- Acton, William, 1813-18758
- Adair, Ellie, author1
- Adami, J. George (John George), 1862-19262
- Adams Nervine Asylum, author.2
- Adams Nervine Asylum.1
- Adams, Christopher P., author1
- Adams, Christopher, author1
- Adams, E. Herbert.1