Mrozkowiak M. An attempt to determine the difference in the impact of loading with the mass of school supplies carried using the left- and right-hand thrust on body posture of 7-year-old pupils of both genders. Pedag Psychol Sport [Internet]. 2020 Sep. 21 [cited 2025 Jul. 2];6(3):44-71. Available from: https://apcz.umk.pl/PPS/article/view/PPS.2020.06.03.004