EBERHARDT, Piotr. Roman Umiastowski - zapomniany polski geograf. Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica, [S. l.], n. 17, p. 147–160, 2014. DOI: 10.18778/1508-1117.17.06. Disponível em: https://czasopisma.uni.lodz.pl/fgsoe/article/view/21072. Acesso em: 22 lip. 2024.