- Army Institute of Pathology (U.S.)1
- Army Institute of Pathology (U.S.), author, issuing body.1
- Army Medical Board of Ireland.1
- Army Medical Museum (U.S.). Section of Comparative Anatomy.1
- Army Service Forces Training Center (Camp Crowder, Mo.), author.1
- Arnold, Richard D. (Richard Dennis), 1808-1876, author1
- Arnold, W. F. (Will Ford) author1
- Artman, Wm. (William) author1
- Ashby, E.1
- Ashmead, Albert S.1
- Ashmead, Albert S., author1
- Ashton, T. J. (Thomas John)1
- Ashton, William Easterly, 1859-1933, author1
- Ashwell, Samuel, 1798-18571
- Assalini, Paolo, 1759-1846?1
- Assier, Adolphe d', 1827-1889 author1
- Associated Charities of Boston, author.1
- Association of Medical Superintendents of American Institutions for the Insane.1
- Atchison, T. A. (Thomas Ayers), 1818-19001
- Atkinson, Donald T. (Donald Taylor), 1874-1959 author1