Nichols, Ivan L. <br/><br/>
Laboratory evaluation of some factors in cyaniding gold placers  
Nichols, Ivan L. 
 - Washington  Bureau of mines  1971 
 - Report Investigation  7559 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>cianuración<br/>oro<br/>placer
<br/><br/><label>Universal Decimal Class. No.: </label>622.06 (47)