SCHLETZ, Alfons. Father Konrad Edmund Trzeciak from 1911 to 1939. Our Past, [S. l.], v. 45, p. 309–328, 1976. DOI: 10.52204/np.1976.45.309-328. Disponível em: https://ojs.academicon.pl/np/article/view/6503. Acesso em: 7 nov. 2026.