Perkhach, O. R. “Analysis of Water Reservoirs and Ponds Resources in the Lviv Region”. Visnyk of V. N. Karazin Kharkiv National University. Series Еcоlogy0, no. 20 (June 7, 2019): 80-86. Accessed December 21, 2024. https://periodicals.karazin.ua/ecology/article/view/12962.