Shea-Albin, V. R.
Geological features that contribute to ground control problems in underground coal mines / by Valois R. Shea-Albin. - Washington, DC : U.S. Dept. of the Interior, Bureau of Mines, 1993. - ii, 38 p. : ill. ; 28 cm. - Information circular ; 9370 . - Information circular (United States. Bureau of Mines) ; 9370. .
Includes bibliographical references (p. 32-34).
93005540
Ground control (Mining)
Coal--Geology.
TN295 TN288 / .U4 no. 9370
622 s 622/.334
Geological features that contribute to ground control problems in underground coal mines / by Valois R. Shea-Albin. - Washington, DC : U.S. Dept. of the Interior, Bureau of Mines, 1993. - ii, 38 p. : ill. ; 28 cm. - Information circular ; 9370 . - Information circular (United States. Bureau of Mines) ; 9370. .
Includes bibliographical references (p. 32-34).
93005540
Ground control (Mining)
Coal--Geology.
TN295 TN288 / .U4 no. 9370
622 s 622/.334