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Comparative Economic Research. Central and Eastern Europe > 2022 > 25 > 1 > 55-74
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 243-252
Comparative Economic Research. Central and Eastern Europe > 2022 > 25 > 1 > 55-74
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 243-252