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Stiffness characteristics of longwall shields / by Thomas M. Barczak, David E. Schwemmer

By: Barczak, Thomas M.
Contributor(s): Schwemmer, David E.
Material type: materialTypeLabelBookSeries: U.S. Bureau of Mines. Report of investigations 9154. Publisher: [Washington, D.C.] : U.S. Dept. of the Interior, Bureau of Mines, 1988Description: 14 p. : ill. ; 28 cm.Report number: USBM ri-9154Subject(s): Longwall mining | Mine roof control
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