Cobban, William A.  1916- <br/><br/>
New and little-known ammonites from the Upper Cretaceous (Cenomanian and Turonian) of the western interior of the United States / 
by William A. Cobban. 
 - Washington:   United States Government Printing Office,   1971.  
 - iii, 24 p., 18 plates :  ill., maps, tables ;  29 cm. 
 -  699 .
<br/><br/>Includes bibliographical references (p. 20-22) and (p. 23-24). 
<br/><br/> A species each of Anisoceras, Desmoceras, Tragodesmoceras, Calycoceras, Nigericeras, and Paracompsoceras, (new genus) is descriped and illustrated. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ammonoidea--West (U. S.)<br/>Paleontology--Cretaceous<br/>Paleontology--West (U. S.)
<br/><br/><label>Dewey Class. No.: </label>564.530978