@inbook {310587,
	title = {A group of young chimpanzees in a one-acre field: Leadership and communication},
	booktitle = {Behavior of Nonhuman Primates},
	year = {1974},
	pages = {83-153},
	publisher = {New York Academic Press},
	organization = {New York Academic Press},
	author = {Menzel, E. W.}
}
