 | 590-16. A group of participants of a physics workshop in National Historic Trails Interpretive Center. Casper, Wyoming, July 17, 2007Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
| 590-16. A group of participants of a physics workshop in National Historic Trails Interpretive Center. Casper, Wyoming, July 17, 2007Similar picturesSmall thumbnails | Use large thumbnails | View as slideshow |
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