Weidenaar, Reynold (1995). Magic Music from the Telharmonium. Lanham, MD: Scarecrow Press. p. 436. ISBN0-8108-2692-5 An authoritative history of the Telharmonium. Weidenaar produced a 29-minute documentary video, also called Magic Music from the Telharmonium. Magnetic Music Publishing Co. 1998. (See website for extensive additional documentation)
Williston, Jay. “Thaddeus Cahill's Telharmonium”. synthmuseum.com. 2018年2月23日閲覧。 “specification...dated April 6, 1897", "application filed February 4, 1896", "weighed about 7 tons in all", " By 1906 the new Telharmonium...weighed almost 200 tons”