@book {56,
	title = {Triangulation du Royaume de Belgique},
	series = {Triangulation du Royaume de Belgique},
	number = {v. 2-3},
	year = {1867},
	publisher = {Cnophs},
	organization = {Cnophs},
	url = {http://books.google.ca/books?id=cCpFAAAAcAAJ},
	author = {Institut cartographique militaire}
}
