Cobban, William Aubrey  1916-2015 <br/><br/>
The late cretaceous Ammonites Scaphites leei reeside and Scaphites Hippocrepis (Dekay) in the western interior of the United States / 
by William A. Cobban. 
 -- Washington :   United States Government Printing Office,   1969 
 - 27 p., [5] h. de lam. -- 
 (Geological Survey Professional Paper  ; 619).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Amonites<br/>Cretácico<br/>Estados Unidos
<br/><br/><label>Universal Decimal Class. No.: </label>564.53(73)"6153"