Gierańczyk, Wiesława, and Tomasz Rachwał. “Structural Changes in the Industry of Poland Aagainst the Background of Eastern European Union States”. Quaestiones Geographicae 31, no. 2 (June 21, 2012): 83–93. Accessed May 5, 2024. https://pressto.amu.edu.pl/index.php/qg/article/view/v10117-012-0021-9.