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| drinking water quality | |||
| drinking-water quality | |||
| качество питьевой воды: 45 phrases in 12 subjects |
| Architecture | 1 |
| Construction | 3 |
| Ecology | 19 |
| Energy industry | 4 |
| General | 2 |
| Makarov | 1 |
| Natural resourses and wildlife conservation | 3 |
| Sakhalin | 1 |
| Technology | 2 |
| United States | 1 |
| Water supply | 7 |
| Weapons of mass destruction | 1 |