Brobst, Donald A.  1925-2011 <br/><br/>
X-ray mineralogy of the Parachute creek member, green river formation, in the northern Piceance creek basin, Colorado / 
by Donald A. Brobst and Jerry D. Tucker. 
 -- Washington :   United States Government Printing Office,   1973 
 - 53 p. -- 
 (Geological Survey Professional Paper  ; 803).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Mineralogía
<br/><br/><label>Universal Decimal Class. No.: </label>549(788)