@book{122062,
	author = {Spain. and Magdalena Redondo, Ricardo},
	title = {Catálogo XXIII.},
	publisher = {s.n.},
	year = {1961.},
	address = {Valladolid},
	note = {At head of title : Dirección General de Archivos y Bibliotecas, España. Instituto di storia medievale, Milano.}
}