@misc{Weigl_Joseph_(1766-1846)_Duetto,
 author={Weigl, Joseph (1766-1846)},
 address={[s.l.]},
 howpublished={online},
 publisher={[s.n.]},
 language={ger},
 type={rękopis muzyczny},
 title={Duetto aus der Opera Die Schweitzer-Familie},
 keywords={opera},
}