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тематика/ключевые слова |
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ecological norm [1] |
Ecological Park [1] |
ecological park [1] |
ecological potential [1] |
ecological problems [3] |
ecological runoff [6] |
ecological state [3] |
ecological state of reservoirs [1] |
ecological status [2] |
ecological system [2] |
ecological tourism [4] |
ecology [144] |
ecology, combustible VER [1] |
econometrics [4] |
economic activities [1] |
economic activity [2] |
economic analysis [7] |
economic and mathematical methods [1] |
economic and mathematical modeling [1] |
economic and social aspects [2] |