@misc{_Przemyśl,,
 howpublished={online},
 publisher={Wydawnictwo „Polonia”},
 language={pol},
 language={ger},
 type={iconic document},
 title={Przemyśl, Fort Nr. 11},
 keywords={Przemyśl Fortress, Fort XI "Duńkowiczki", fortifications, destructions, postcards, World War (1914-1918)},
}