Becker, Karl R. <br/><br/>
Effect of direct-current firing levels on detonator delay times / 
by Karl R. Becker and J. Edmund Hay. 
 - [Washington, D.C.] :  U.S. Dept. of the Interior, Bureau of Mines,  1982. 
 - 13 p. ;  27 cm. 
 - Report of investigations / United States Department of the Interior, Bureau of Mines ;  8613 .
 - Report of investigations (United States. Bureau of Mines) ;  8613. .
<br/><br/>Includes bibliographical references. 
<br/><br/><label>LCCN: </label>81607872  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Blasting.<br/>Electric detonators--Testing.
<br/><br/><label>LC Class. No.: </label>TN23  TN279  / .U43 no. 8613 
<br/><br/><label>Dewey Class. No.: </label>622 s  622/.4 
<br/><br/><label>Gov. Doc. Class. No.: </label>I 28.23:8613.