@misc{Kursbureau_des_Reichs-Postamts_Postleitkarte,
 author={Kursbureau des Reichs-Postamts},
 address={Berlin},
 howpublished={online},
 publisher={Gea Verlag G.m.b.H.},
 language={ger},
 title={Postleitkarte 2. Köslin, Danzig, Bromberg (Posen)},
 keywords={20 w., Pomorze, kartografia, Wielkopolska (region), Prusy Zachodnie, mapy pocztowe},
}