| Rittichai Sukbanjongwatthana |
| Rivas, Aldrin Alameda |
| River siltation due to tin mining |
| Riyanto, Bambang Adi |
| Rizal, Bishnu Prasad |
| Rizal, Sunit |
| Rizardo, Erwin Lara |
| Rizvi, Shahzada Abbas |
| Rizvi, Syed Shameem Ahmad |
| Roa, Arturo G |
| Robak, Anna |
| Robby Soetanto |
| Robert, Olivier |
| Robise, Jude Amila Mihiranga |
| Robles, Lilia Sinogba |
| Roblo, Teresita M. |
| Rochard, Kevin |
| Rodjarek Nilvanich |
| Rodriguez, Melinda Ricafort |
| Rodsutti, Michita Champathes |