Informazzjoni minn organizzazzjoni tal-arti (Verifikat minn Operabase)
The Favorite by Donizetti, Ġim 21 Set 1973, Minn (1973/1973), Immexxi minn Paul-Émile Deiber,, Surmast Direttur Carlo Felice Cillario, War Memorial Opera House, San Francisco, United States