Jackowski, Antoni. “The Last before the War Convention of Polish Geographers in Krakow. The Institute of Geography of the Jagiellonian University, 28–29 May 1939”. Acta Universitatis Lodziensis. Folia Geographica Socio-Oeconomica, no. 27, Mar. 2017, pp. 33-47, doi:10.18778/1508-1117.27.02.