КРАЙНЮКОВ, О. М. 1. “ESTIMATION OF THE ECOLOGY-TOXICOLOGICAL STATE OF RIVER LOPAN WITHIN THE LIMITS OF KHARKIV”. Visnyk of V. N. Karazin Kharkiv National University Series «Еcоlogy», no. 1147 (1), 57-62. https://periodicals.karazin.ua/ecology/article/view/3921.