@misc{_Extrablatt, howpublished={online}, publisher={Merzbach, Ludwik}, language={ger}, language={pol}, type={gazeta}, title={Extrablatt zum Kreisblatt des Kreises Posen-West 1917.06.30 Jg.29 Nr42}, keywords={czasopisma niemieckie, powiat poznaƄski zachodni, Posen-West, Kreis Posen-West}, }