Szulc, Witold. “Professor Stefan Kowal - Sozial- Und Witrschaftshistoriker Und Akademischer Lehrer [Professor Stefan Kowal - Social and Economic Historian and Academic Teacher]”. Studia Historiae Oeconomicae 27, no. 1 (June 1, 2009): 3–12. Accessed November 22, 2024. https://pressto.amu.edu.pl/index.php/sho/article/view/43990.