Shimer, H. W. <br/><br/>
Index fossils of north America 

 - New York John Wiley & Sons  John Wiley & Sons  1955 
 - 837p. 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Fossils - North America
<br/><br/><label>Dewey Class. No.: </label>561  / S41I