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- 12 October 2014 English operator: Flickr described at URL: https://www.flickr.com/photos/departmentofenergy/10556202784...(226 × 288 (23 KB)) - 05:03, 23 April 2023
- "Courtesy Argonne National Laboratory." https://creativecommons.org/publicdomain/mark/1.0/PDMCreative Commons Public Domain Mark 1.0falsefalse English...(1,868 × 2,572 (895 KB)) - 17:34, 17 August 2024