@book{97578,
	author = {Instituto Nacional de Estadística, Geografía e Informática. México},
	title = {Mexican bulletin of statistical information},
	publisher = {INEGI,},
	year = {199-},
	address = {Aguascalientes, Ags. :},
	note = {La biblioteca tiene : v.3 July-September,1997 -- v.2 April-June,1998 -- v.4 October-December,1998}
}