460699; GNCN; 161; Air photo in: "A Survey of the Recreational Resources of the Colorado River Basin", National Park Service, 1950; p. 189. [See original page for additional text and/or photocopied contour map]
Papers of Otis R. Marston: Still images, 1870-1978. vols. 1-40, Colorado River and tributaries (Headwaters to Lee's Ferry) The Otis Marston Colorado River Collection
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