@book{35480,
	author = {López Portillo, José, 1920-2004},
	title = {Umbrales},
	publisher = {Editorial Patria, S. A. de C. V.,},
	year = {1997},
	address = {México :},
	note = {Esta obra pertenece al donativo del exmagistrado Rodolfo Ricardo Ríos Vázquez}
}