@misc{Bley_Fritz_(1853-1931)_Der,
 author={Bley, Fritz (1853-1931)},
 address={Berlin},
 howpublished={online},
 publisher={Sole & Tetzlaff, Verlagsbuchhandlung},
 language={pol},
 type={nadbitka},
 title={Der Kernpunkt der Polengefahr},
}