- 4-H Club Week1
- 4-H Youth Development Program (U.S.)43
- Abrahamsen, Martin Abraham, 1908-2
- Adair, Robert B.1
- Adams, Richard1
- Agricultural Research Center (Beltsville, Md.)2
- Allen, George, football player1
- Allen, Tom, -19563
- Alpha Gamma Rho Fraternity1
- Alpha Zeta10
- American Meteorological Society14
- Anderson, Donald B., 1899-19943
- Anderson, R. L. (Richard Loree), 1915-1
- Apperson, George (Beulah), Mrs.4
- Arey, John A., 1887-19857
- Arnold, Donald S., 1920-1
- Asbill, Clarence M., 1902-19872
- Asbury, Louis H. (Louis Humbert), 1877-19751
- Aycock, M. Edmund9
- Aycock, Robert6