Wells, John D.  1946- <br/><br/>
Relationship of Precambrian quartzite-schist sequence along coal creek to Idaho springs formation front range, Colorado / 
by John D. Wells, Douglas M. Sheridan and Arden L. Albee. 
 -- Washington :   United States Government Printing Office,   1964 
 - 23 p. -- 
 (Geological Survey Professional Paper  ;  454-O).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Estratigrafía
<br/><br/><label>Universal Decimal Class. No.: </label>551.7(788)