Sass, Roman. “Impact of the Directions of Investment on the Production and Economical Effects of Farms in the Bydgoszcz Sub-Region”. Journal of Agribusiness and Rural Development 25, no. 3 (December 31, 2012): 225-240. Accessed May 9, 2024. http://www1.up.poznan.pl/jard/index.php/jard/article/view/563.