Bibliography:

• Clark, Ronald W. Edison, the Man Who Made the Future. New York: Putnam, 1977.
• Israel, Paul. Edison: a Life of Invention. New York: John Wiley, 1998.
• Sage, Glenn. Tinfoil.com at http://www.tinfoil.com/ Portland OR, 2003
• Wile, Raymond R. "The Development of Sound Recording at the Volta Laboratory," Association for Recorded Sound Collections Journal, 1990, pp. 208-225.