@book{772,
	author = {Barnett, Raymond A. and Ziegler, Michael R.},
	title = {Calculus for business, economics, life sciences, and social sciences /},
	publisher = {Dellen ;},
	year = {c1993.},
	series = {College mathematics series},
	address = {New York :},
	edition = {6th ed.},
	note = {Includes index.}
}