@article {keitt-1998,
	title = {Dynamics of North American breeding bird populations},
	journal = {Nature},
	volume = {393},
	year = {1998},
	pages = {257{\textendash}260},
	url = {http://www.keittlab.org/~tkeitt/papers/keitt-stanley-1998.pdf},
	author = {Keitt, TH Timothy H and Stanley, HE}
}
