| Author | Popularity |
| Baker, F. W. G. |
2 |
| Baker, H. D. |
2 |
| Baker, N. H. |
2 |
| Di Castri, Francesco |
2 |
| Ecology in Practice - Establishing a Scientific Basis for Land Management (Conference) Paris) |
2 |
| Hadley, M. (Malcolm) |
2 |
| International Council of Scientific Unions |
2 |
| Ryder, E. A. |
2 |
| Unesco |
2 |
| Aaron L Wichman |
1 |
| Abbas Dehghan |
1 |
| Abbas Rezaianzadeh |
1 |
| Abdonas Tamosiunas |
1 |
| Abdul Basit |
1 |
| Abdul Hamid Zargar |
1 |
| Abdullah Alkandari |
1 |
| Abdullatif Husseini |
1 |
| Abhijit Sen |
1 |
| Abla M Sibai |
1 |
| Abu AM Hanif |
1 |
| Adam Hahn |
1 |
| Adam W Craig |
1 |
| Adela Chirita-Emandi |
1 |
| Adelheid Weber |
1 |
| Adolfo Rubinstein |
1 |
| Adrian Richter |
1 |
| Adroaldo Cesar Araujo Gaya |
1 |
| Afshin Ostovar |
1 |
| Agneta Sjöberg |
1 |
| Agnès Le Port |
1 |
| Agustinus Soemantri |
1 |
| Ahmad A Zainuddin |
1 |
| Ahmad Faudzi Yusoff |
1 |
| Ahmad Reza Dorosty |
1 |
| Ahmed A Madar |
1 |
| Aida Pilav |
1 |
| Akihiro Yoshihara |
1 |
| Akram Pourshams |
1 |
| Ala'a Alkerwi |
1 |
| Alain Morejon |
1 |
| Albert L Ly |
1 |
| Albertino Damasceno |
1 |
| Alberto Barceló |
1 |
| Alberto Palloni |
1 |
| Albina A Fakhretdinova |
1 |
| Alejandro Diaz |
1 |
| Alejandro Vásquez-Echeverría |
1 |
| Aleksander Giwercman |
1 |
| Aleksandra Gomula |
1 |
| Aleksandra Piwonska |
1 |