Exploration and Mining2019
HARD COAL RESOURCES IN THE UPPER SILESIA COAL BASIN (POLAND) ACCORDING TO POLISH CLASSIFICATION AND INTERNATIONAL JORC CODE
Jarosław Chećko · SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 19th SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings19th, Science and Technologies in Geology, Exploration And Mining