@misc{Fitelberg_Grzegorz_(1879-1953)_Berceuse,
 author={Fitelberg, Grzegorz (1879-1953)},
 howpublished={online},
 publisher={Gebethner i Wolff},
 type={druk muzyczny},
 title={Berceuse : (pour quators a cordes)},
}