Handbook of marine mammals / 
edited by Sam H. Ridgway and Richard J. Harrison. 
 - London :  Academic Press,  1981. 
 - v. : ill. ; 24 cm. 
<br/><br/> Include bibliographical references and index. 
<br/><br/> The walrus, sea lions, fur seals and sea otter -  Seals  vol. 1.  vol. 2. 
<br/><br/><label>ISBN: </label>0125885016 
<br/><br/><label>LCCN: </label>80-42010 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine mammals--Handbools, manuals, etc.