Hosted by Laurence Libin in Lend Us Your Ears: A Series of Twelve Radio Programs. CD. Recording., The Metropolitan Museum of Art. New York, 1978.
Written by, Honorary Editor Eric Halfpenny. "The Trumpets of J W Haas: A survey of four generations of Nuremberg brass instrument makers." The Galpin Society Journal (1965), vol. XVIII, pg. 36.
Catalogue of the Crosby Brown Collection of Musical Instruments: Europe. The Metropolitan Museum of Art. New York, 1904, vol. I, pg. 181.