PODOLSKA-MEDUCKA, Aldona. Coal Basins in the Second Polish Republic. Kwartalnik Kolegium Ekonomiczno-Społecznego. Studia i Prace, [S. l.], n. 2, p. 71–90, 2017. DOI: 10.33119/KKESSiP.2017.2.4. Disponível em: https://econjournals.sgh.waw.pl/kwes/article/view/22. Acesso em: 20 maj. 2024.