- 4-H Youth Development Program (U.S.)1
- Abernathy, Charles O. (Charles Owen), 1941-1
- Abrams, Charles F.1
- Ackerman, G. W.1
- Agricultural Research Center (Beltsville, Md.)2
- Agricultural Research Council of Central Africa1
- Agricultural and Mechanical College of Texas. Dept. of Agricultural Engineering1
- Agronomy Research Reports (North Carolina Agricultural Experiment Station)10
- Akehurst, B. C.1
- Allen, A. B.2
- Allen, A. V.3
- Allen, Jack1
- Allgood, James G.2
- Allied Chemical Corporation1
- Allison, J. L. (J. Lewis)4
- Alpha Zeta9
- Alsbrook, Bill1
- American Agriculturist1
- American Limestone Company1
- American Machine and Foundry Company1