@book{1870,
	author = {Walle, A. L. J. van de. author and Boucher, Hughes, illustrator},
	title = {Belgique gothique : architecture, art monumental /},
	publisher = {M Vokaer},
	year = {1971},
	series = {Histoire de l'architecture en Belgique},
	address = {Bruxelles :}
}