@misc{Balzer_Oswald_Marian_(1858-1933)_Genealogia,
 author={Balzer, Oswald Marian (1858-1933)},
 howpublished={online},
 publisher={Akademia Umiejętności w Krakowie},
 language={polski},
 type={book},
 title={Genealogia Piastów},
 keywords={801-900, 901-1000, 1001-1100, 1801-1900, Genealogia, Historia, Piastowie (dynastia), Rody, Władcy},
}