KELLER, W. D. <br/><br/>
Clay minerals in the Morrison formation of the Colorado plateau / 
by W. D. Keller. 
 -- Washington :   United States Government Printing Office,   1962 
 - 90 p. + map. -- 
 (Geological Survey Bulletin  ; 1150).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Colorado<br/>Rocas arcillosas
<br/><br/><label>Universal Decimal Class. No.: </label>552.52(788)