@book{201520,
	author = {F.A. Brockhaus Mannheim (Firm)},
	title = {Brockhaus Enzyklopädie : },
	publisher = {Brockhaus, },
	year = {1968.},
	address = {Wiesbaden : },
	edition = {17. völlig neubearbeitete Auflage des Grossen Brockhaus}
}