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hydroecological monitoring (2) |
гідроекологічний моніторинг (2) |
actitvity to improve the state of water resources (1) |
current state of water resources (1) |
impact of economic activity on the state of water resources (1) |
river (1) |
river basin (1) |
river basin state (1) |
river water quality (1) |
self-purifi cation ability of the river (1) |
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