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Arthur Roberts and Sam Mynatt drilling for shot in boulder in roadway at Norris Dam. NARA . Scope and content General notes Local identifier Tennessee Valley Authority NARAAuthor Hine Lewis Wickes Photographer File ArthurRobertsandSamMynatt drillingforashotinboulderinroadwayatNorrisDam NARA tif tif File ArthurRobertsandSamMynatt