Drozdowski, Marian Marek, and Janusz Żarnowski. “Social-Structural Changes in the Second Polish Republic”. Studia Historiae Oeconomicae 4, no. 1 (June 1, 1970): 47–80. Accessed October 14, 2026. https://pressto.amu.edu.pl/index.php/sho/article/view/57051.