@misc{Secker_Hans_Friedrich_(1888-1960)_Kunstforschende,
 author={Secker, Hans Friedrich (1888-1960)},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 type={książka},
 title={Kunstforschende Gesellschaft E. V. Danzig : Aufruf!},
 keywords={Gdańsk, Danzig, źródła},
}