Encylopedia of marine mammals/  
Editors ;William F.Perrin, Bernd Wursing and J.G.M. Thewissen 
 - 2nd ed. 
 - Amsterdam:   Academic Press,   2009 
 - xxxiv, 1316p.:   ill. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9780123735539 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine mammals--Encylopedia
<br/><br/><label>LC Class. No.: </label>QL 713.2 ENC 2009