Eberhardt, Piotr. “Roman Umiastowski – a Forgotten Polish Geographer”. Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica, no. 17 (January 1, 2014): 147–160. Accessed December 7, 2025. https://czasopisma.uni.lodz.pl/fgsoe/article/view/21072.