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Journal of the Society of Motion Picture Engineers ( Volume: 45, Issue: 4, October 1945)
Du Pont Fine-Grain Sound Films—Types 232 and 236
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- History of Sound Motion Pictures[Active]
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- 1 Frayne J. G. Scoville R. R. : “Analysis and Measurement of Distortion in Variable-Density Recording,” J. Soc. Mot. Pict. Eng. , XXXII , 9 (June, 1939 ), p. 648 .EXTERNAL