| Author | Popularity |
| Courrau, Jose |
3 |
| Dudley, Nigel |
3 |
| Hockings, Marc |
3 |
| International Union for Conservation of Nature |
3 |
| James, Robyn |
3 |
| Makombo, John |
3 |
| Mathur, Vinod |
3 |
| Parrish, Jeffrey |
3 |
| Stolton, Sue |
3 |
| UNESCO |
3 |
| United Nations Foundation |
3 |
| Baxter, Greg autor/a |
1 |
| Biggs,Harry |
1 |
| Breen,Charles |
1 |
| Freitag,Stefanie |
1 |
| Guevara, Roger autor/a |
1 |
| Hockings, Marc autor/a |
1 |
| Hockings,Marc |
1 |
| Hockings,Marc T. |
1 |
| Moll,Eugene J. |
1 |
