Mainiero, Richard J. <br/><br/>
Use of sheathed explosive charges on longwalls / 
by Richard J. Mainiero and Lon D. Santis. 
 - Washington, D.C. :  U.S. Dept. of the Interior, Bureau of Mines,  1989. 
 - 8 p. :  ill. ;  27 cm. 
 - Report of investigations ;  9294 .
 - Report of investigations (United States. Bureau of Mines) ;  9294. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>89600272  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Explosives--Testing.<br/>Longwall mining.
<br/><br/><label>LC Class. No.: </label>TN23  TN803  / .U43 no. 9294 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.334 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23: