| University of Gävle | SE3 | Suecia |
| A. O. Kovalevsky Institute of Biology of the Southern Seas of RAS | RV1 | Federación de Rusia |
| Academician Abdulla Garayev Institute of Physiology | AZA | Azerbaiyán |
| Academy of Sciences of the Democratic People's Republic of Korea | KP0 | República Popular Democrática de Corea |
| Academy of Sciences of the Islamic Republic of Iran | IRT | Irán (República Islámica del) |
| Acharya N.G. Ranga Agricultural University | INC | India |
| Acta Natura et Scientia | TRT | Turquía |
| Action for Sustainable Efficacious Development and Awareness | INJ | India |
| Addis Ababa University | ET1 | Etiopía |
| Aegean Agricultural Research Institute | TRC | Turquía |
| Afe Babalola University | NG4 | Nigeria |
| Africa Nazarene University | KE8 | Kenya |
| Africa Scholarly Science Communications Trust | KE9 | Kenya |
| African Crop Science Society | UG3 | Uganda |
| African Journals OnLine | AJ0 | Sudáfrica |
| African Union | ET2 | Etiopía |
| AfricaRice | QA1 | Côte d'Ivoire |
| Afyon Kocatepe University | TRV | Turquía |
| Aga Khan University | PK1 | Pakistán |
| Agency for the Promotion of European Research | ES3 | España |
| Agricultural Academy | BG4 | Bulgaria |
| Agricultural Documentation Centre, Ministry of Agriculture and Irrigation | YE0 | Yemen |
| Agricultural Knowledge and Innovation Institute | SK0 | Eslovaquia |
| Agricultural Planning, Economics, and Rural Development Research Institute | IRD | Irán (República Islámica del) |
| Agricultural Research and Education Organization | IR0 | Irán (República Islámica del) |
