Pomianek, Iwona. “DIVERSITY OF POLISH REGIONS IN THE LEVEL OF TECHNICAL INFRASTRUCTURE DEVELOPMENT”. Acta Scientiarum Polonorum. Oeconomia 19, no. 3 (September 18, 2020): 75-83. Accessed May 19, 2024. https://js.wne.sggw.pl/index.php/aspe/article/view/.30.