Klymenko, V. H., & Cherkashyna, N. I. (2016). Assessment of water quality in the river Lopan within the boundaries of Kharkiv region. Visnyk of V. N. Karazin Kharkiv National University, Series "Geology. Geography. Ecology", (44), 172-177. Retrieved from https://periodicals.karazin.ua/geoeco/article/view/7509