Nowak , Joanna. “Discussions of the Origin, Nature and Differentiation of Mankind in Biblioteka Warszawska, 1841–1864”. Yearbook of the History of Polish Press 24, no. 1 (April 20, 2021): 25–41. Accessed May 20, 2024. https://rhpp.uken.krakow.pl/article/view/9973.