@book{121335,
	author = {Wilkins, John S., and ebrary, Inc.},
	title = {Defining species},
	publisher = {P. Lang,},
	year = {c2009.},
	series = {American university studies. Series V, Philosophy,},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10516803}
}