Cobban, William A.  1916- <br/><br/>
The Upper Cretaceous ammonite Rhaeboceras Meek in the western interior of the United States / 
by William A. Cobban. 
 - Washington:   U. S. Government Printing Office,   1987.  
 - iii, 15 p., 14 plates :  ill., tables ;  29 cm. 
 -  1477 .
<br/><br/> Descriptions and illustrations of an important guide fossil to rocks of early Maastrichtian age. 
<br/><br/>Includes bibliographical references (p. 13-14) and index (p. 15). 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rhaeboceras<br/>Paleontology--Cretaceous<br/>Paleontology--West (U. S.)
<br/><br/><label>Dewey Class. No.: </label>564.53