@book{22316,
	author = {Grubb, Thomas C. and ebrary, Inc.},
	title = {Ptilochronology},
	publisher = {Oxford University Press,},
	year = {2006.},
	series = {Oxford ornithology series ;},
	address = {Oxford :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10271624}
}