Encyclopedia of marine mammals / 
editors, William F. Perrin, Bernd Wursig, J. G. M. Thewissen 
 - 2nd ed. 
 - Amsterdam :  Elsevier,  2009 
 - xxxiv, 1316 p. :  ill. (some col.) ;  28 cm. 
<br/><br/><label>ISBN: </label>9780123735539  RM523.45 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Marine mammals--Encyclopedias