JAMROŻEK, Wiesław. Three Pedagogical Congresses. Biuletyn Historii Wychowania, [S. l.], n. 38, p. 171–178, 2018. DOI: 10.14746/bhw.2018.38.29. Disponível em: https://pressto.amu.edu.pl/index.php/bhw/article/view/20142. Acesso em: 23 kwi. 2024.