Borowka, Borys. COST ANALYSIS OF DRIVING DOG HEADINGS IN COAL MINE OF THE UPPER SILESIAN COAL BASIN (POLAND). SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 16th International Multidisciplinary Scientific GeoConference SGEM2016, Science and Technologies in Geology, Exploration and Mining, 2016, pp. 213-220. https://doi.org/10.5593/sgem2016/b12/s03.028