[1]
P. Siwiec, «Roman Stopa – Pioneer of Polish African Studies .......... 15», в Pioneers of African Studies in Kraków: In memory of Professor Roman Stopa (1895-1995), R. Kłosowicz, ред. Poland: Księgarnia Akademicka Publishing, 2020, сс. 15–23. doi: 10.12797/9788381382359.01.