@book{523,
	author = {Sociedad Castellana de Excursiones},
	title = {Boletín de la Sociedad Castellana de Excursiones.},
	editor = {Imp. de Juan R. Hernando)},
	publisher = {Sociedad Castellana de Excursiones, },
	year = {1903-1919 (},
	address = {Valladolid : },
	url = {http://bibliotecadigital.jcyl.es/i18n/consulta/registro.cmd?id=19963}
}