Cooley, M.E., Harshbarger, J.W., Akers, J.P., Hardt, W.F., and Hicks, O.N., 1969, Regional hydrogeology of the Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah with a section on vegetation: U.S. Geological Survey, Professional Paper PP-521-A, scale 1:125,000
Plate 4: Maps showing Climatological Data and Vegetation of the Navajo and Hopi Indian Reservations, Arizona, New Mexico, and Utah
Image provided by U.S. Geological Survey Publications Warehouse
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