Keen, Martin L. <br/><br/>
The how and why wonder book of prehistoric mammals / 
illustrated by John Hull ; editorial production: Donald D. Wolf. 
 - [Deluxe ed.]. 
 - New York :  Grosset & Dunlap,  c1962. 
 - 48 p. :  ill. (some col.) ;  29 cm. 
 - How and why wonder books .
<br/><br/> Studies the fossilized remains of extinct mammals. 
<br/><br/> For young readers 
<br/><br/><label>LCCN: </label>62012792 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mammals, Fossil--Juvenile literature.<br/>Mammals, Fossil.<br/>Mammals, Fossil.
<br/><br/><label>Dewey Class. No.: </label>569