@book{6338,
	author = {Poppinga, Onno and Barth, Hans Martin},
	title = {Ostfriesland : },
	publisher = {Syndikat},
	year = {1986},
	address = {Frankfurt am Main},
	edition = {4. Aufl.},
	url = {https://services.dnb.de/plus/idn/860229130/blurb/}
}