Angel Mattiello baritone)
Lauritz Melchior,
Emanuel List,
Humberto Di Toto,
Teatro Colón Orchestra and Chorus,
Herbert Janssen,
Lydia Kindermann,
Renato Cesari,
Richard Wagner,
Angel Mattiello baritone),
Fritz Busch,
Helen Traubel,
Rogelio Baldrich 
