Think Different - Maria Callas An American-born Greek soprano and one of the most renowned opera singers of the century.
Opera Singer Maria Callas Complete Studio Recordings Now Remastered - Broadway World
Maria Callas, Stuttgart 1959 by Robert Lebeck
Cecil Beaton ‘Maria Callas’ 1957 "You are born an artist or you are not. And you stay an artist, dear, even if your voice is less of a fireworks. The artist is always there.