00830nam#a2200277zcb4500 990000000320203331 AT-OBV 20230419173409.0 tu 930210|1993####|||###########|||#|#eng#c AC00545182 (AT-OBV)AC00545182 AC00545182 (Aleph)000000032ACC01 (DE-599)OBVAC00545182 TUW ger rakwb eng XD-US Listak, Jeffrey M. aut Longwall retreat of gate road pillars by J. M. Listak and E. R. Bauer Washington, DC 1993 11 S. graph. Darst. Report of investigations / United States Department of the Interior, Bureau of Mines 9444 Literaturverz. S. 11 Bauer, Eric R. aut (AT-OBV)AC00073533 9444