@book{12692,
	author = {Johnson, Robert},
	title = {Estadística elemental. /},
	publisher = {Grupo Editorial Iberoamérica,},
	year = {1990},
	series = {Ej.1},
	address = {México, D. F. :},
	edition = {Primera edición.},
	note = {Incluye índice.}
}