Gilbert, G.K., Marvine, A.R., and Howell, E.E., 1876, [Map of] Parts of northern and northwestern Arizona and southern Utah, scale 1 to 506,880, accompanying the Geological atlas projected to illustrate geographical explorations and surveys west of the 100th meridian of longitude, under the command of First Lieut. Geo. M. Wheeler: New York, sheet 67.
