Barczak, Thomas M.
Evaluation of multitimbered wood crib supports / by Thomas M. Barczak and Carol Tasillo. - Washington, DC : U.S. Dept. of the Interior, Bureau of Mines, 1991. - 11 p. : ill. - Report of investigations ; 9341. . - Report of investigations (United States. Bureau of Mines) ; 9341. .
90045533
Mine timbering.
Mine roof control--Testing.
Evaluation of multitimbered wood crib supports / by Thomas M. Barczak and Carol Tasillo. - Washington, DC : U.S. Dept. of the Interior, Bureau of Mines, 1991. - 11 p. : ill. - Report of investigations ; 9341. . - Report of investigations (United States. Bureau of Mines) ; 9341. .
90045533
Mine timbering.
Mine roof control--Testing.