Wrzaszcz, Wioletta, and Józef St. Zegar. “Economic Sustainability of Agricultural Holdings in Poland in the Context of Their Environmental Impact”. European Journal of Sustainable Development 5, no. 4 (October 1, 2016): 497. Accessed May 3, 2024. http://ojs.ecsdev.org/index.php/ejsd/article/view/427.