@book{7649,
	author = {Negro, Adolfo and Pérez Cacho, Santiago},
	title = {Hacia la matemática /},
	publisher = {Alhambra,},
	year = {1981.},
	series = {Serie A},
	address = {México D.F. :},
	edition = {1a. ed.},
	note = {Incluye índice}
}