@article {29251,
	title = {Food habits and breeding range of herring gulls in the Canadian Prairie provinces},
	volume = {75},
	year = {1973},
	pages = {478-480},
	publisher = {The Condor},
	url = {http://www.jstor.org/stable/1366576?seq=3},
	author = {Vermeer, Kees}
}
