“THE IMPACT OF KOSZALIN AND SŁUPSK ON THE SOCIO-ECONOMIC DEVELOPMENT LEVEL OF MIDDLE POMERANIA COMMUNES”. Research Bulletins of the Faculty of Economic Sciences 1, no. 21 (January 11, 2018): 159–177. Accessed July 20, 2025. https://ezeszyty.wne.tu.koszalin.pl/index.php/zeszyty/article/view/92.