@misc{Gruber_Carl_(1885-1966)_Die,
 author={Gruber, Carl (1885-1966) and Keyser, Erich (1893-1968)},
 howpublished={online},
 publisher={Deutscher Kunstverlag},
 language={ger},
 type={book},
 title={Die Marienkirche in Danzig},
 keywords={Gdańsk (Poland ; city), churches, architecture},
}