@book{29006,
	author = {Krassowski, Jan and E. Wende i S-ka},
	title = {Mikołaj Kopernik :},
	publisher = {E. Wende i Ska. ;},
	year = {1923.},
	address = {Warszawa :},
	url = {http://kpbc.umk.pl/publication/146}
}