@book{3473,
	author = {Schupetta, Ingrid and Stadtarchiv Krefeld},
	title = {Die Billstein-Briefe :},
	publisher = {Stadtarchiv},
	year = {1992},
	series = {Edition Billstein},
	address = {Krefeld},
	url = {https://d-nb.info/941363910/04}
}