Łuczka, Władysława, and Lidia Jabłońska-Poruczek. “Professional Activity Oof Working-Age Inhabitants of the Wielkopolskie Voivodeship”. Journal of Agribusiness and Rural Development 38, no. 4 (December 31, 2015): 737-745. Accessed April 18, 2024. http://www1.up.poznan.pl/jard/index.php/jard/article/view/448.