@book{12862,
	author = {Peñaherrera de Costales, Piedad. and Costales Samaniego, Alfredo.},
	title = {Historia social del Ecuador /},
	publisher = {Casa de la Cultural Ecuatoriana,},
	year = {1971.},
	address = {Quito :},
	note = {La biblioteca posee el volumen 4.}
}