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Journal of the Society of Motion Picture Engineers ( Volume: 18, Issue: 4, April 1932)
Optics of Projectors for 16 MM. Film
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- Trend of Lamp Development and Operation in Motion Picture Projectors Employing 16 MM. Film[Active]
- 2 Kellner Hermann : “The Function of the Condenser in the Projection Apparatus,” Trans. Soc. Mot. Pict. Eng . (Nov., 1918 ), No. 7, p. 44 .EXTERNAL
- 3 Kellner Hermann : “Can the Efficiency of the Present Condensing Systems Be Increased?” Trans. Soc. Mot. Pict. Eng . (Oct., 1923 ), No. 17, p. 136 .EXTERNAL