Imlay, Ralph Willard   1908-1989 <br/><br/>
Characteristic lower Cretaceous megafossils from northern Alaska / 
by Ralph W. Imlay. 
 -- Washington :   United States Government Printing Office,   1961 
 - 74 p., [20] h. de lam. -- 
 (Geological Survey Professional Paper  ; 335).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Alaska<br/>Cretácico<br/>Paleontología
<br/><br/><label>Universal Decimal Class. No.: </label>551.763(798)