Giuseppe Lugo

State Opera Company

Erik Tuxen

Carlo Bacci

Jan Kiepura

The Czech Philharmonic Orchestra

Gino Nastrucci

Paul Bonneau

Ernst Gruber

Waldo Salt

Ben Weber

Felix Mendelssohn-Bartholdy

Antonio Cortis

Victor Trucco

New York City Opera

Sergei Prokofiev

Ralph Peters

Luigi Cherubini

Vienna Opera Company

Fritz Stiedry

Gina Cigna

Orchestra And Chorus Of The Dallas Civic Opera Co.

Enzo Titta

Alexei Ivanov

Anny Felbermayer