with Tito Gobbi, Elisabeth Schwarzkopf; cond. Karajan
with Carlo Bergonzi, Cornell MacNeil, Shirley Verrett; cond. Cleva
with Robert Merrill, Alfredo Kraus; cond. Solti
with Richard Tucker, Robert Merrill; cond. Previtali
with Renato Cioni, Mario Sereni; cond. Karajan