@misc{_Plan_[ca,
 copyright={Public Domain},
 address={Warszawa},
 howpublished={online},
 year={[ca 1928]},
 publisher={Nakład Druk. i Litogr. F. Kasprzykiewicza},
 language={pol},
 title={Plan Wielkiej Warszawy},
 type={Image},
 keywords={street maps, Warsaw street maps, Warsaw},
}