- Agnew, D. Hayes (David Hayes), 1818-1892, author2
- Agnew, Daniel, 1809-1902, author1
- Agnew, James, -18401
- Agnew, W. P. (William Penn)1
- Agnoli, J. B. (Juan B.), author1
- Agote, Luis, 1868-1954 author1
- Agramonte, A. (Aristides), 1869-1931, author2
- Agricola, Georg, 1494-1555, Author3
- Agricola, Georg, 1494-1555, author4
- Agrippa von Nettesheim, Heinrich Cornelius, 1486?-1535, author1
- Aguiar Filho, João Pedro de.1
- Aguilar, Fernando, 1856-1930, author1
- Aguilar, Manuel C., author1
- Aguilár, Alberto R., author1
- Aguilera, Adrian, author1
- Aguilera, Carlos, active 1885, author1
- Aguirre y Valdes, Agustin, author1
- Aguirre y Valdés, Pedro, author1
- Aguirre, Francisco, 1862-, author1
- Ahl's Splint Manufacturing Co., author.1