| |||
| данные о качестве и составе воды | |||
|
quality-of-water data : 4 phrases in 4 subjects |
| Ecology | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water supply | 1 |
| |||
| данные о качестве и составе воды | |||
|
quality-of-water data : 4 phrases in 4 subjects |
| Ecology | 1 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 1 |
| Water supply | 1 |