@misc{_Mapa_[post,
 copyright={Public Domain},
 address={[S.l.]},
 howpublished={online},
 year={[post 1924]},
 publisher={[s.n.]},
 language={pol},
 title={Mapa poglądowa posiadłości Księcia von Pless na Polskim Górnym Śląsku},
 keywords={topographical maps, von Pless (family), Silesia, 20th century},
}