Heikes, V.C. <br/><br/>
Gold, silver, copper, lead and zinc in Montana in 1915 :   Mines report. 

 - Washington, D.C.  Government Printing Office  1916 
 - pp. 577-612 
<br/><br/> Impreso 
<br/><br/><br/>Ingles 
<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA