Environmental problems of hard coal industry in Poland

by Blaschke, Wiesław, Lorenz, Urszula, Mokrzycki, Eugeniusz
Source: 1. 5th Conference on environment and mineral processing, part I 1. Ostrava : Vysoká škola báňská - Technická univerzita, 2000 1. 8070787651 1. S. 11-18