@book{180928,
	author = {Balparda, Gregorio de. and Sociedad "El Sitio"},
	title = {El sentido liberal del Fuero de Vizcaya },
	publisher = {Sociedad "El Sitio", },
	year = {[ca. 1990]},
	series = {Publicaciones de la Sociedad "El Sitio" ; },
	address = {Bilbao : }
}