Samenova, Zh.K., N.T. Yerzhanov, M.B. Uruzalinova, and M. Kravka. “Research on Chlorophyll-a Concentrations in Freshwater Lakes of Pavlodar Region”. BULLETIN of the L.N. Gumilyov Eurasian National University. BIOSCIENCE Series 147, no. 2 (June 28, 2024): 120–136. Accessed November 21, 2024. https://bulbio.enu.kz/index.php/main/article/view/529.