Original: Drdla, Franz. Plate nn. Souvenir. Drdla, Franz. Cello, Piano. Ball, M. J. Publisher. New York. M. Witmark & Sons, 1913. Date.
Oversettelse: Minne. Cello, piano. M. Witmark. Dato. 1904 Copyright. Public Domain Kommenter denne notene Ferdighetsnivå.