Smagulova G, Kеnzhegali Z, Tuleuova B. Some problems of ecological security in Central Kazakhstan (on the example of water resources). HPH [Internet]. 2020 Jun. 30 [cited 2026 Sep. 27];98(2):149-56. Available from: https://ejh.buketov.edu.kz/history-philosophy-vestnik/article/view/470