from today’s New York Times review:
Along with Maria Callas and Joan Sutherland, she was an acknowledged exponent of the bel canto Italian repertory during the period of its post-World War II revival. Though she essentially had a light soprano voice, her sound was robust and enveloping. In her prime her technique was exemplary. She could dispatch coloratura roulades and embellishments, capped by radiant high D’s and E-flat’s, with seemingly effortless agility. She sang with scrupulous musicianship, rhythmic incisiveness and a vivid sense of text.