 |
| речной бассейн: 6 phrases in 4 subjects |
| Environment | 1 |
| Geology | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water resources | 3 |
|
| речной бассейн: 6 phrases in 4 subjects |
| Environment | 1 |
| Geology | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water resources | 3 |