Correlations and coexistence of characteristics describing body posture and feet in children of both sexes aged 4 to 6 years

Journal of Education, Health and Sport, Tom 7, Numer 5 (2017) s. 225-264
Mirosław Mrozkowiak, Karol Bibrowicz, Roland Hadlich, Piotr Kurzeja, Tomasz Szurmik