Johnston, Joanne L.
Instrumentation procedures for fully grouted rock bolts / by Joanne L. Johnston and Dennis J. Cox. - Washington, D.C. : United States Dept. of the Interior, Bureau of Mines, 1993. - 10 p. : ill. ; 29 cm. - Information circular / Bureau of Mines; 9341 . - Information circular (United States. Bureau of Mines) ; 9341. .
Includes bibliographical references.
92029982
Mine roof bolting.
Rock bolts.
TN295 TN289.3 / .U4 no. 9341
622 s 622/.28
Instrumentation procedures for fully grouted rock bolts / by Joanne L. Johnston and Dennis J. Cox. - Washington, D.C. : United States Dept. of the Interior, Bureau of Mines, 1993. - 10 p. : ill. ; 29 cm. - Information circular / Bureau of Mines; 9341 . - Information circular (United States. Bureau of Mines) ; 9341. .
Includes bibliographical references.
92029982
Mine roof bolting.
Rock bolts.
TN295 TN289.3 / .U4 no. 9341
622 s 622/.28