The Life of Vertebrates / 
Young J.Z . 
 - 3rd ed. 
 - Oxford :  Oxford University Press,  1981. 
 - xv,645 p.: 
<br/><br/><label>ISBN: </label>019442393x 
<br/><br/><label>LC Class. No.: </label>QL605  / .Y68  1981