00686naa#a2200193#i#450# EN\URAL'SKIY GOSUDARSTVENNYY AGRARNYY UNIVERSITET\bibl\38975 20241220202012.5 1997-4868 20200731b2020####ek#y0engy0150####ca ENG RU Assessment of the ecological well-being of the rivers of the Middle Urals in areas with increased technogenic load Journal article Ekaterinburg Ural State Agrarian University 2020 5 с. Journal article local Gutova Mariya Olegovna Flefel' Hassan El'sayed Andryushechkina Marina Sergeevna usau.editorum.ru