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| United Nations Conference on the Human Environment (1972, Стокгольм) | |||
| U.N. Conference on Human Environment (Стокгольм, 1972 г.) | |||
| Конференция ООН по окружающей среде: 11 phrases in 7 subjects |
| Astronautics | 1 |
| Ecology | 2 |
| Energy industry | 2 |
| Environment | 1 |
| European Bank for Reconstruction and Development | 2 |
| United Nations | 1 |
| Water supply | 2 |