Gotkiewicz, W. and Mickiewicz, B. 2015. The Realization of the Agri-Environmental Management Scheme in the Area of Natura 2000 in the Valley of Biebrza River. Journal of Agribusiness and Rural Development. 38, 4 (Dec. 2015), 657-664. DOI:https://doi.org/10.17306/JARD.2015.70.