UMIŃSKI, Wacław. Fr. Siemaszko Educational Institution in the interwar period. Our Past, [S. l.], v. 105, p. 295–303, 2006. DOI: 10.52204/np.2006.105.295-303. Disponível em: https://ojs.academicon.pl/np/article/view/4833. Acesso em: 14 nov. 2026.