@book{9422,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {Essentials of college mathematics for business, economics, life sciences, and social sciences /},
	publisher = {Dellen Pub. Co. ;},
	year = {c1989.},
	series = {College mathematics series},
	address = {San Francisco, Calif. :},
	note = {Includes indexes.}
}