Jezierski, Andrzej, and Zbigniew Landau. “The Directions of the Economic Development of People’s Poland in the Years 1944-1969”. Studia Historiae Oeconomicae 5, no. 1 (December 1, 1970): 329–350. Accessed October 14, 2026. https://pressto.amu.edu.pl/index.php/sho/article/view/57495.