[1]
Gawor, Łukasz, Szmatłoch, A. and Dolnicki, P. 2013. Valorization of Post-mining Dumping Grounds as Geotourism Sites on the Example of the Ruhr Region. Studies of the Industrial Geography Commission of the Polish Geographical Society. 24, (Oct. 2013), 106–118. DOI:https://doi.org/10.24917/20801653.24.7.