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

Görner, Karol, 1959-

Selected socio-economic factors influencing swimming competency of secondary school students / Karol Görner, Ladislav Kručanica, Zygmunt Sawicki

In Journal of Physical Education and Sport. -- Piteşti : Editura Universităţii din Piteşti, 2020. -- ISSN 2247-8051. -- ISSN 2247-806X. -- Vol. 20, no. 4 (2020), pp. 1666-1672