@misc{Missalek_Erich_Das,
 author={Missalek, Erich},
 address={Bielefeld},
 address={Leipzig},
 howpublished={online},
 publisher={Verlag von Velhagen & Klasing},
 publisher={Velhagen & Klasing},
 language={ger},
 type={książka},
 title={Das Königreich Polen},
 keywords={Polska -- historia},
}