Title: Vsesoi︠u︡znai︠a︡ nauchno-tekhnicheskai︠a︡ konferent︠s︡ii︠a︡ po okhrane poverkhnostnykh i podzemnykh vod ot zagri︠a︡znenii︠a︡
Subjects: Water, Congresses, Environmental protection, Pollution