Social Research and Conservation
| CONTENS OF HEXAVALENT CHROMIUM HEAVY METAL (Cr6+) IN MAHAKAM RIVER WATERS IN THE AREA OF SAMARINDA CITY EAST KALIMANTAN | |
| Rachmad Mulyadi |
| Soil Physical Properties Development in Post-Coal Mining Rehabilitation Area in East Kutai District, East Kalimantan, Indonesia | |
| veronika murtinah |