@inbook {brown1993spatial,
	title = {Spatial association learning in hummingbirds},
	booktitle = {Case Studies in Biometry},
	year = {1994},
	pages = {159-187},
	publisher = {John Wiley \& Sons},
	organization = {John Wiley \& Sons},
	chapter = {9},
	address = {New York},
	author = {Graham, J and Petkau, A.John}
}
