@book{953,
	author = {Purcell, Edwin J. and Varberg, Dale E.},
	title = {Calculus with analytic geometry /},
	publisher = {Prentice-Hall,},
	year = {c1987.},
	address = {Englewood Cliffs, N.J. :},
	edition = {5th ed.},
	note = {Includes index.}
}