@misc{Urban_Reinhold_Das,
 author={Urban, Reinhold},
 address={Striegau},
 howpublished={online},
 publisher={Verlag von Theodor Urban},
 language={ger},
 type={tekst},
 title={Das Reich Gottes unter den Polen},
 keywords={Cymelia, historia, chrześcijaństwo, Słowianie},
}