Walter Ludwig: Lebendige Vergangenheit - Mozart, Wolfgang Amadeus and Nicolai, Otto and Flotow, Friedrich von and Graener, Paul and Thomas, Ambroise and Bizet, Georges and Puccini, Giacomo and Ludwig, Walther and Perras, Margherita and Hüsch, Gerhard and Seidler-Winkler, Bruno and Benda, Hans von and Ladwig, Werner and Zaun, Fritz and Brachvogel, Albert Emil (Austro Mechana, 1980)
https://katalog.adlr.link/Record/0-1733855386