00822nam#a2200265zcb4500 990000000370203331 AT-OBV 20230225191302.0 tu 900411|1990####|||###########|||#|#eng#c AC00086852 (AT-OBV)AC00086852 AC00086852 (Aleph)000000037ACC01 (DE-599)OBVAC00086852 TUW ger rakwb eng XD-US Signer, Stephen P. aut Field verificatin of load transfer mechanics of fully grouted roof bolts by S. P. Signer Washington, DC 1990 13 S. Ill., graph. Darst. Report of investigations / United States Department of the Interior, Bureau of Mines 9301 Literaturverz. S. 7 - 8 (AT-OBV)AC00073533 9301