@book{21389,
	author = {Asimov, Isaac},
	title = {La alta edad media :},
	publisher = {Alianza,},
	year = {1997},
	series = {El Libro de Bolsillo, Alianza Editorial, Sección: Humanidades ;},
	address = {Madrid :},
	edition = {1 ed. 6° Reimpresión},
	note = {Incluye Índice}
}