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- Please sort and annotate in a user-friendly manner. For formatting, consider using automated reference wikification.
- Marvin, Carolyn, When Old Technologies were New, 1988.
- Pool, Ithiel de Sola (editor), The Social Impact of the Telephone, 1977, page 33, plus chapter 2, "The Pleasure Telephone" by Asa Briggs.
- Povey, Peter J. and Earl, R. A. J., Vintage Telephones of the World, 1998. ("The Electrophone" chapter)
- Sivowitch, Elliot, "Musical Broadcasting in the 19th Century", Audio, June, 1967.
- Solymar, Laszlo, Getting the Message: A History of Communications, 1999.