@misc{Leoncavallo_Ruggero_(1857-1919)_I,
 author={Leoncavallo, Ruggero (1857-1919)},
 howpublished={online},
 publisher={Gebethner i Wolff},
 language={pol},
 language={ita},
 type={druk muzyczny},
 title={I pagliacci : dramma in due atti. No 1, Arioso, per canto},
 keywords={opery 19 w.},
}