- 4-H Club Week55
- 4-H Youth Development Program (U.S.)247
- Ackerman, G. W.24
- Adair, Robert B.1
- Agricultural Research Center (Beltsville, Md.)2
- Agronomy Research Reports (North Carolina Agricultural Experiment Station)1
- Albanese, Naomi G., 1916-19891
- Aldridge, Steve1
- Alexander, Kemp1
- Alford, A. O. (Alonzo O.)1
- Allen, A. V.5
- Allgood, James G.3
- Alpha Tau Alpha1
- Alpha Zeta2
- Alston, Eula Faulcon4
- Altman, L. B.2
- American Forestry Association5
- American Red Cross2
- American Society for the Prevention of Cruelty to Animals1
- American Society of Agricultural Engineers2