@misc{Czermak_Wiktor_(1863-1913)_Grunwald,
 author={Czermak, Wiktor (1863-1913)},
 howpublished={online},
 publisher={Macierz Polska},
 language={pol},
 type={książka},
 title={Grunwald},
 keywords={Bitwa pod Grunwaldem (1410)},
}