Issues of children's health ecology in Karaganda region (mid-1940s)Valeria Kozina, Zhanara Abdukarimova, Gulnar Baigozhina, Zauresh Saktaganova, Zhanna Mazhitova and Dina KurbanovaE3S Web of Conf., 389 (2023) 02020DOI: https://doi.org/10.1051/e3sconf/202338902020