@book{28591,
	author = {Bernhard, Ludwig and Duncker und Humblot},
	title = {Das polnische Gemeinwesen im preussischen Staat :},
	publisher = {Verlag von Duncker & Humblot,},
	year = {1907.},
	address = {Leipzig :},
	url = {https://obc.opole.pl/publication/1788}
}