@article {37592,
	title = {Plumage, morphometric, and song variation in Morning (Oporornis philadelphia) and Macgillivray{\textquoteright}s (O. tolmiei) warblers},
	volume = {107},
	year = {1990},
	pages = {161-171},
	publisher = {The Auk},
	url = {http://www.jstor.org/stable/4087814?seq=1},
	author = {Pitocchelli, Jay}
}
