Selected socio-economic factors influencing swimming competency of secondary school students

GÖRNER, Karol - KRUČANICA, Ladislav - SAWICKI, Zygmunt. Selected socio-economic factors influencing swimming competency of secondary school students. In Journal of Physical Education and Sport. - Piteşti : Editura Universităţii din Piteşti, 2020. ISSN 2247-8051, 2020, vol. 20, no. 4, pp. 1666-1672.