- African American engineers.1
- Agricultural laborers--Southern States.1
- Alaskan Malamute.1
- Allan, A. A. (Allan Alexander), -1941.1
- Allied Forces.1
- Allied Powers (1919- )--History.1
- Allied and Associated Powers (1914-1920). Treaties, etc. Hungary, 1920 June 4.1
- Alternative education--United States.1
- Animal feeding.1
- Animals--Food.1
- Apponyi, Albert, gróf, 1846-1933.1
- Aquatic sports--United States.1
- Aras, Tevfik Rüştü, 1883-1
- Armed Forces--Cuba.1
- Artists.1
- Astronomers.1
- Astronomy--Observations.1
- Automobiles--History--20th century.1
- Automobiles.1
- Balkan Entente, 1934-1941.1