Tooker, E. W.  1923-2013 <br/><br/>
Altered wallrocks in the Central part of the front range mineral Belt Gilpin and clear creek counties, Colorado / 
by E. W. Tooker. 
 -- Washington :   United States Government Printing Office,   1963 
 - 102 p. + map. -- 
 (Geological Survey Professional Paper  ; 439).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Depósitos de minerales<br/>Geología
<br/><br/><label>Universal Decimal Class. No.: </label>553(788)