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- Audio amplifiers[remove]2
- 35mm (photographic film size)1
- Broadcasting1
- Chemistry, Technical1
- Chemists1
- Clippings (Information Artifacts)1
- Color motion pictures1
- Color photography -- Films1
- Color photography -- Research1
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- Composers -- United States -- Societies, etc1
- Composition (Music) -- 20th century1
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- Eidophor system1
- Electrical engineering1
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- Electronic music1