File:Atomic Clock024.jpg
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 17:47, 14 June 2019 | 5,656 × 4,464 (21.21 MB) | Hohum | Cropped border | |
15:20, 14 March 2014 | 5,982 × 4,852 (24.46 MB) | NISTResearchLibrary |
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