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Loboda, N.S., SmaliiО.V., KatynskaІ.V. and KotovichО.M. 2019. Assessment of changes in the water quality along the length of the Siverskyi Donets river at the beginning of the 21st century. Ukrainian hydrometeorological journal. 23 (Jun. 2019), 54-68. DOI:https://doi.org/10.31481/uhmj.23.2019.06.