AGH Journal of Mining and Geoengineering
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 301-307
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 151-157
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 301-307
AGH Journal of Mining and Geoengineering > 2012 > Vol. 36, no. 3 > 151-157