@book{141009,
	author = {Guinguand, Maurice and Lanne, Béatrice,},
	title = {La cuna de las catedrales},
	publisher = {Espasa-Calpe},
	year = {c1978.},
	series = {Enigmas y sociedades secretas},
	address = {Madrid},
	note = {Translation of : Le berceau des cathédrales.}
}