Czyżewski, Andrzej, and Jakub Staniszewski. “LAND AND LABOUR PRODUCTIVITY IN POLISH AGRICULTURE AGAINST HIGHLY-DEVELOPED COUNTRIES OF THE EUROPEAN UNION”. Acta Scientiarum Polonorum. Oeconomia 15, no. 4 (December 30, 2016): 53–63. Accessed May 3, 2024. https://aspe.sggw.edu.pl/article/view/364.