@misc{Keyser_Erich_Danzigs,
 author={Keyser, Erich},
 howpublished={online},
 publisher={A. W. Kafemann},
 language={ger},
 title={Danzigs Geschichte},
 type={książka},
 keywords={Gdańsk - historia, Keyser, Erich (1893-1968)},
}