The origin and activities of the Marshal Józef Piłsudski Association for Social and Educational Work in Częstochowa in the years 1927–1939 . Sport tur. [Internet]. 2025 Dec. 22 [cited 2026 Mar. 13];8(4):67–85. Available from: https://czasopisma.ujd.edu.pl/index.php/sport/article/view/2943