@misc{Matejko_Jan_(1838–1893)_Upadek,
 author={Matejko Jan (1838–1893)},
 copyright={PAN Biblioteka Kórnicka},
 howpublished={online},
 publisher={"Stella"},
 publisher={Bochnia},
 type={pocztówka},
 title={Upadek Polski},
}