Red Carson piloting the helicopter over the "Esmeralda" at the head of Hance Rapid. Joe Desloge and Ed Hudson are in the boat. Marston and Taylor in the background
Papers of Otis R. Marston: Still images, 1870-1978. vols. 56-104, Colorado River and tributaries (Grand Canyon to Gulf of California) The Otis Marston Colorado River Collection
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