TY - CPAPER AU - Lenka Tkacikova TI - RAW MATERIAL POLICY AND POTENTIAL SOURCES OF RAW T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 18th International Multidisciplinary Scientific GeoConference SGEM2018, Science and Technologies in Geology, Exploration and Mining PY - 2018 SP - 709 EP - 714 DO - 10.5593/sgem2018/1.3/s03.090 PB - STEF92 Technology ER -