Robert Grace
Robert Grace/Emma Steinbakken
Louis Sgarro/Robert Nagy/Carlo Bergonzi/Jerome Hines/Leontyne Price/Grace Bumbry
Louis Sgarro/Jerome Hines/Leontyne Price/Carlo Bergonzi/Grace Bumbry/Robert Nagy
Leontyne Price/Grace Bumbry/Robert Merrill/Louis Sgarro/Carlo Bergonzi/Jerome Hines
Louis Sgarro/Jerome Hines/Leontyne Price/Carlo Bergonzi/Grace Bumbry/Robert Merrill