Łobos, Krzysztof, and Mirosława Szewczyk. “Factors Affecting EBIT of Companies Engaged in Quarrying of Stone in Opolskie Voivodship and Dolnośląskie Voivodship”. Regional Barometer. Analyses & Prognoses, no. 2 (28) (September 28, 2012): 57–63. Accessed November 8, 2024. https://czaz.akademiazamojska.edu.pl/index.php/br/article/view/1238.