Ivashchenko, Olga, and Mirosława Cieślicka. “Features of Evaluations of Power Loadsin Boys 7 Years Old”. Journal of Education, Health and Sport 7, no. 1 (January 26, 2017): 175–183. Accessed November 29, 2024. https://apcz.umk.pl/JEHS/article/view/4175.