For citations:

Boronina L.B., Sadchikov P.N., Usinina A.E., Tazhieva S.Z. THE FORECAST OF ECOLOGICAL CONDITION OF SURFACE WATERS OF THE LOWER VOLGA BASIN. South of Russia: ecology, development. 2012;7(3):12-16. (In Russ.) https://doi.org/10.18470/1992-1098-2012-3-