Creator
- Arkins, Edwin L.1
- Armor, Samuel Glasgow, 1819-18851
- Armstrong, Arthur E. (Arthur Edward), 1884-19761
- Armstrong, Christopher H.1
- Armstrong, Louise Van Voorhis, 1885-19481
- Arnold Transit Company.1
- Arnold family.1
- Artiaga, Santiago, 1878-19621
- Association for Asian Studies.1
- Association of Universities for Research in Astronomy.1
- Association of the 20th Michigan Infantry Volunteers.1
- Aswad, Barbara C.1
- Atkins, Daniel E. (Daniel Ewell)1
- Atkinson, Edmund.1
- Atwell, Helen M.1
- Atwell-Hicks.1
- Auch, John Christian.1
- Austin, Judson L.1
- Averill, George R., 1893-19711
- Axelrod, Solomon Jacob, 1912-19871