Repsher, Richard C.
Long-term rock noise plotting techniques / by Richard C. Repsher and D. Jan Black. - Pgh. [i.e. Pittsburgh] Pa. : U.S. Dept. of the Interior, Bureau of Mines, [1979] - 10 p. : ill. ; 27 cm. - Report of investigations ; 8399 . - Report of investigations (United States. Bureau of Mines) ; 8399. .
Bibliography: p. 10.
79016190
Coal mines and mining--Safety measures.
Rock noise--Measurement.
TN23 TN295 / .U43 no. 8399
622/.08 s 622/.33
Long-term rock noise plotting techniques / by Richard C. Repsher and D. Jan Black. - Pgh. [i.e. Pittsburgh] Pa. : U.S. Dept. of the Interior, Bureau of Mines, [1979] - 10 p. : ill. ; 27 cm. - Report of investigations ; 8399 . - Report of investigations (United States. Bureau of Mines) ; 8399. .
Bibliography: p. 10.
79016190
Coal mines and mining--Safety measures.
Rock noise--Measurement.
TN23 TN295 / .U43 no. 8399
622/.08 s 622/.33