@misc{Keyser_Erich_(1893-1968)_Die,
 author={Keyser, Erich (1893-1968)},
 howpublished={online},
 publisher={Deutsche Verlags-Anstalt},
 language={ger},
 type={książka},
 title={Die Stadt Danzig},
 keywords={Gdańsk, historia, topografia, zabytki},
}