Beus, Michael J. <br/><br/>
Instrument to measure the initial deformation of rock around underground openings / 
by Michael J. Beus and Earl L. Phillips and Galen G. Waddell. 
 - [Washington] :  United States. Dept. of the Interior, Bureau of Mines,  [1975.] 
 - 40 p. :  ill. 
 - Report of investigations ;  8275 .
 - Report of investigations (United States. Bureau of Mines) ;  8275 .
<br/><br/><label>LCCN: </label>90065055     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rock deformation.            <br/>Rock mechanics--Research