Muench, Josef. Art Greene, former Cowboy and Indian Trader turned Riverman. Here he poses in front of his unique aluminum boat propelled with an airplane engine offering excursions of the rugged beauty of Glen Canyon up the Colorado River to see famous Rainbow Natural Bridge. He treated his guests to the comfort of camping on the sand and meals around an open fire under the stars. Photograph, ca. 1950-1956. Colorado Plateau Archives, Cline Library, Northern Arizona University. https://archive.library.nau.edu/digital/collection/cpa/id/12287/