@misc{_Gdynia,
 howpublished={online},
 publisher={[s. n.]},
 language={pol ; eng ; ger},
 type={mapa},
 title={Gdynia 1938 : plan portu = plan of the port = Hafenplan},
 keywords={20 w., kartografia, Gdynia (Polska) -- 1900-1945},
}