McKnight, Edwin Thor  1902-1992 <br/><br/>
Geology and ore deposits of the Rico district, Colorado / 
by Edwin T. Mcknight. 
 -- Washington :   United States Government Printing Office,   1974 
 - 100 p. + map. -- 
 (Geological Survey Professional Paper  ; 723).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Depósitos de minerales
<br/><br/><label>Universal Decimal Class. No.: </label>553(788)