Investigation of longwall gateroad roof support characteristics of Powhatan no. 4 mine : instrumentation plan /

Bibliographic Details
Main Author:	Chekan, G. J. (Gregory J.)
Corporate Author:	United States. Bureau of Mines
Other Authors:	Babich, D. R. (Daniel R.)
Format:	Government Document Book
Language:	English
Published:	Pgh. [i.e. Pittsburgh], Pa. : U.S. Dept. of the Interior, Bureau of Mines, 1982.
Series:	Report of investigations (United States. Bureau of Mines) ; 8628.
Subjects:	Coal mines and mining > Safety measures. Caving mining > Safety measures. Ground control (Mining)

Evans: US Documents (Annex 5th floor)