@book{6820,
	author = {Protter, Murray H. and Morrey, Charles B.},
	title = {Cálculo con geometría analítica /},
	publisher = {Addison-Wesley Iberoamericana,},
	year = {1996.},
	address = {Buenos Aires :},
	edition = {3a ed.},
	note = {Colaboración Manuel López Mateos.}
}