Litvinov , A. 2020. WATER BALANCE AND ECOLOGICAL CONDITIONS IN THE RYBINSK RESERVOIR IN LOWWATER YEARS OF THE 21ST CENTURY . EurasianUnionScientists. 3, 70 (Feb. 2020), 4-8. DOI:https://doi.org/10.31618/ESU.2413-9335.2020.3.70.542.