@misc{Keyser_Erich_(1893-1968)_Eine,
 author={Keyser, Erich (1893-1968)},
 howpublished={online},
 publisher={A. W. Kafemann},
 language={ger},
 type={broszura},
 title={Eine Wanderung durch Alt-Danzig},
 keywords={Gdańsk, przewodniki},
}