Ecology and health of the population in the city of Tselinograd in 1964 (the case of infectious hepatitis and typhoid fever outbreak)Valeria Kozina, Svetlana Yeleukhanova, Zhanna Mazhitova, Aigul Zhalmurzina and Dina KurbanovaE3S Web Conf., 371 (2023) 06019DOI: https://doi.org/10.1051/e3sconf/202337106019