@misc{Keyser_Erich_(1893-1968)_The,
 author={Keyser, Erich (1893-1968)},
 howpublished={online},
 publisher={A. W. Kafemann},
 language={eng},
 type={książka},
 title={The importance of Germans and Slavs for Western-Prussia},
 keywords={ludność, statystyki, Prusy Zachodnie, Polska},
}