Henderson, Charles W. <br/><br/>
Gold, silver, copper, lead and zinc in Colorado in 1921 :   Mines report. 

 - Washington, D.C.  Government Printing Office  1923 
 - pp. 479-511 
<br/><br/> Impreso 
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<br/><br/><label>Subjects--Topical Terms: </label><br/>MINERIA
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