@misc{Ruckgaber_Jan_(1799-1876)_Marche,
 author={Ruckgaber, Jan (1799-1876)},
 howpublished={online},
 publisher={Józef Eberle},
 publisher={S. A. Krzyżanowski},
 title={Marche funèbre : pour piano},
 type={druk muzyczny},
}