Norman, David . <br/><br/>
Prehistoric life : the rise of the vertebrates /  Textual Documents 
David Norman. 
 - London :  Boxtree Ltd. ,  1994. 
 - 245p. :  ill ;  28cm. . 
<br/><br/><label>ISBN: </label>185283 400 5 
<br/><br/><label>Subjects--Index Terms: </label>Prehistoric life Reference section 
<br/><br/><label>Dewey Class. No.: </label>590  / No 781 Pr