Prompt copper recovery from mine strip waste / 
by B.W. Madsen ... [et al.] 
 - [Washington] :  United States. Dept. of the interior, Bureau of Mines,  1975. 
 - 19 p. :  ill. 
 - Report of investigations ;  8012 .
 - Report of investigations (United States.  8012 .
<br/><br/><label>LCCN: </label>90065080     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Copper ores.<br/>Strip mining.      <br/>Spoil banks.