Cichocki, R. and Jankowska, K. 2019. „The Polish Peasant in Europe and America” and the problem of relations between sociological research and its applications for solving social problems. Człowiek i Społeczeństwo. 47, (Jun. 2019), 19–35. DOI:https://doi.org/10.14746/cis.2019.47.2.