@book{247140,
	author = {Jefferson, Thomas A. and Webber, Marc A.},
	title = {Marine mammals of the world : a comprehensive guide to their identification / },
	publisher = {Academic Press,},
	year = {2015},
	address = {London :},
	edition = {2nd ed.},
	url = {http://www.sciencedirect.com/science/book/9780124095427}
}