An Introduction to Marine Mammal Biology and Conservation/ 
Parsons,E.C.M. 
 - 1 
 - London:  Jones & Bartlett Learning,  2012. 
 - 346 
<br/><br/><label>ISBN: </label>0763783447 
<br/><br/><label>Dewey Class. No.: </label>599.5  / PAR/M