Janowska-Biernat, Justyna. “ECONOMIC ASPECTS OF THE APPLICATION OF PLANT PROTECTION AND BIOPREPARATIONS IN SELECTED ORGANIC FARMS”. Journal of Agribusiness and Rural Development 13, no. 3 (December 31, 2009): 57-62. Accessed March 28, 2024. http://www1.up.poznan.pl/jard/index.php/jard/article/view/876.