Imlay, Ralph Willard   1908-1989 <br/><br/>
Succession and speciation of the Pelecypod Aucella / 
by Ralph W. Imlay. 
 -- Washington :   United States Government Printing Office,   1959 
 - P. 155-167, [2] h. de lam. -- 
 (Geological Survey Professiona Paper  ;  314-G).
<br/><br/><label>Subjects--Topical Terms: </label><br/>Braquiópodos fósiles
<br/><br/><label>Universal Decimal Class. No.: </label>564.8