Piet Dieckers

Margarete Matzenauer , Erna Sack , Lauritz Melchior , Richard Tauber , Kirsten Flagstad , Adrienne Matzenauer , Maria Jeritza , Ernestine Schumann-Heink , Joseph Schmidt , Marian Anderson , Armand Tokatyan , Fleischmann Hour Orchestra , Ben Grauer , Magic Key Orchestra , NBC Symphony Orchestra , Vienna Philharmonic , Milton Cross , Holland Symphony Orchestra , Rudy Vallee , Edwin McArthur , Oswald Kabasta , Piet Dieckers