Stachura, Virgil J. <br/><br/>
Delayed blasting tests to improve highwall stability :  a progress report / 
by Virgil J. Stachura and Larry R. Fletcher. 
 - Pittsburgh, Pa. :  U.S. Dept. of the Interior, Bureau of Mines,  1984. 
 - 24 p. :  ill., maps ;  28 cm. 
 - Bureau of Mines report of investigations ;  8916 .
 - Report of investigations (United States. Bureau of Mines) ;  8916. .
<br/><br/>Bibliography: p. 21. 
<br/><br/><label>LCCN: </label>84600214  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Blasting.<br/>Coal mines and mining--Safety measures.
<br/><br/><label>LC Class. No.: </label>TN23  TN279  / .U43 no. 8916 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.334 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8916.