Young, J. Z.  1907- <br/><br/>
The life of vertebrates / 
by J. Z. Young 
 - 2nd ed. 
 - New York :  Oxford University Press,  1962 
 - 820 p. :  ill. ;  25 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Vertebrates<br/>Vertebrates, Fossil