Samenova Z, Yerzhanov N, Uruzalinova M, Kravka M. Research on chlorophyll-a concentrations in freshwater lakes of Pavlodar region. bio [Internet]. 2024 Jun. 28 [cited 2024 Nov. 21];147(2):120-36. Available from: https://bulbio.enu.kz/index.php/main/article/view/529