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A800424 U12G FRACTURE STUDY JOHNSTONE (Project Engineer) APR 9 80 EG&G/NTS PHOTO LAB Publication Date: 4/9/1980 EDGERTON, GERMESHAUSEN & GRIER; EG&G; FRACTURE STUDY; FRACTURE TOUGHNESS; G-TUNNEL; NEVADA; NEVADA TEST SITE; NTS; NUCLEAR ENERGY TECHNOLOGY; NUCLEAR EXPLOSIONS; TEST SITES; TUNNELS; TUNNELS BY USAGE; UGT; UNDERGROUND; UNDERGROUND TESTING historical images. 1972 - 2012. Department of Energy. National Nuclear Security Administration. Photographs Related to Nuclear Weapons Testing at the Nevada Test Site.
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