File:Aluminum disk.jpg
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Aluminum disk (audio recording) used in the 1930s for instantaneous recording. Image courtesy Sarah Stauderman from Library of Congress collection.
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 21:54, 11 January 2012 | | 1,600 × 1,200 (50 KB) | Sstauderman (talk | contribs) | Aluminum disk (audio recording) used in the 1930s for instantaneous recording. Image courtesy Sarah Stauderman from Library of Congress collection. |
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