Materiały konferencyjne SEP 1992

344 Underground Explołtation School * 92 in Jahre 1989. Gluckauf 13/14, 1990. 7. Sikora W. - Reconstruction of Mining Technology in Longwalls in Połish Hard Coal Mines. Fair Magazlne 3/91. Słmmex. 8. Spance A. M. - Trends for New Techno 1 ogy and Equi pment for the Mining Industry in the Year 2000. World Mining Congress. 9. Merrit P.C. - As time Changes, So Do Longwalls. Coal 2, 1991 10. Podstawowe wskaźniki techniczne przodków ścianowych 01.07.91