Mirkiewicz, Agnieszka. “The Sports Badge “Fit For Work and Defence” (‘Sprawny Do Pracy I Obrony’ – SPO). The Characteristics and Principles of Earning It on the Example of Sports Associations in Rzeszów Voivodship in 1953 ”. Sport and Tourism Central European Journal 3, no. 4 (December 31, 2020): 79–96. Accessed April 17, 2024. https://czasopisma.ujd.edu.pl/index.php/sport/article/view/1161.