- Alzate y Ramírez, José Antonio de, 1737-17991
- Am Ende, Charles G., author1
- Amador, Juan B., author1
- Amah, Ginachukwu, author1
- Amato, Cintio d', 17th cent., author9
- Amato, Cintio d', active 17th century1
- Amator, author2
- Ambler, J. G. (John Gardner)1
- Ambler, J. G. (John Gardner) author1
- Ambrose, James Clement.1
- Ambrosoli, Carlo, author1
- Ament, Alexandra, author5
- Ament, Wilhelm, 1876-1956, author1
- American Academy of Allergy and Immunology. Meeting 1990 : Baltimore, Md.)1
- American Academy of Dental Science (Boston, Mass.)2
- American Academy of Dental Science (Boston, Mass.), author.1
- American Academy of Medicine, author.2
- American Ambulance in Russia.1
- American Anti-Vivisection Society.1
- American Association for the Advancement of Science. Anniversary Meeting (1898 : Boston, Mass.), author.1