@book{23069,
	author = {Unamuno, Miguel de,},
	title = {Viejos y jóvenes /},
	publisher = {Espasa-Calpe,},
	year = {1968.},
	series = {Austral},
	address = {Madrid :},
	edition = {5a ed.},
	note = {Incluye índice de autores.}
}