Materiały konferencyjne SEP 1993 - tom 1

Underground Exploitation Schcx)l '93 6. Non-Metallic Minerals Mining As there is a huge amount of reconstruction work (industrial, public and private buildings, roads and railways) to do, there are no difficulties for high-quality non-metallic minerals producing companies. Most of the companies are sold and running without mentionable difficulties. 16 Tom II