@misc{Styfi_Jan_(1839?-1921)._Ryt._Józef_[1874],
 author={Styfi, Jan (1839?-1921). Ryt.},
 address={Warszawa},
 howpublished={online},
 year={[1874]},
 language={pol},
 title={Józef Unger},
 type={grafika},
}