Materiały konferencyjne SEP 1992

Ministry of Industry Ninerals and Energy Economy Research Centre Polish Academy of Sciences Institute of Underground Mining and Work Safety University of Mining and Metallurgy P R O C E E D I N G S o F T H E UNDERGROUND EXPLOITATION SCHOOL ' 9 2 WISŁA - JAWORNIK , 2 - 7 MARCH, 1992 K R A K Ó W , 1992