Baldwin, Neil
"Edison, Inventing the Century" 1995

E. R. Fenimore
"His Master's Voice was Eldridge R. Johnson" 1974

Bazerman, Charles
"The Languages of Edison's Light" 2002

Conot, Robert
"A Streak of Luck " 1979

Israel, Paul
"Edison, A Life of Invention " 1998

Smoot, Tom
"The Edisons of Fort Myers, Discoveries of the Heart 2004

Welch, Walter L. and Leah Brodbeck Stenzel Burt
"From Tinfoil to Stereo" The Acoustic Years of the Recording Industry  1877-1929

Baldwin, Neil
"Edison, Inventing the Century" 1995

Johnson, E. R. Fenimore
"His Master's Voice was Eldridge R. Johnson" 1974

Welch, Walter L. and Leah Brodbeck Stenzel Burt
"From Tinfoil to Stereo" The Acoustic Years of the Recording Industry  1877-1929