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Journal of the Society of Motion Picture Engineers ( Volume: 33, Issue: 11, November 1939)
The Polyrhetor—A 150-Channel Film Reproducer
SMPTE • Journal Article • [Active]
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- 1 Mathies W. H. : “The Call Announcer.” Bell Laboratories Record (Jan., 1930 ).EXTERNAL
- Glunt O. M. : “The Call Announcer—a Telephone Application of Sound Picture Ideas,” J. Soc. Mot. Pict. Eng. , XVI (March, 1931 ). p. 362 .EXTERNAL