Encyclopedia of marine mammals / 
editors, William F. Perrin, Bern d Wèursig, J.G.M. Thewissen. 
 - 2nd ed. 
 - Amsterdam :  Academic Press,   c2009. 
 - xxxviii, 1414 p. :  ill. (some col.), maps ;   29 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/><label>ISBN: </label>9780123735539 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine mammals-- Encyclopedias.
<br/><br/><label>Dewey Class. No.: </label>599.503