Processing chalcopyrite concentrates by a nitrogen roast-hydrometallurgical technique / 
by R. C. Gabler [et al.]. 
 - Washington, D.C.] :  U.S. Dept. of the Interior,  1975. 
 - 18 p. :  ill. 
 - Report of investigations / Bureau of Mines, U.S. Department of the Interior ;  8067 .
 - Report of investigations (U.S. Department of the Interior.  8067 .
<br/><br/> Tables. 
<br/><br/><label>LCCN: </label>92045026     
<br/><br/><label>Subjects--Topical Terms: </label><br/>Chalcopyrite.