Wiśniewska, Joanna, and Roma Ryś-Jurek. “Income Aggregates in Private Farms in Poland in the Years 1990-2008”. Journal of Agribusiness and Rural Development 18, no. 4 (December 31, 2010): 107-118. Accessed May 7, 2024. http://www1.up.poznan.pl/jard/index.php/jard/article/view/846.