Halpenny, L.C., 1951, Preliminary report on the ground-water resources of the Navajo and Hopi Indian reservations Arizona, New Mexico, and Utah: U.S. Geological Survey Open-File Report [unnumbered], 13 p., 1 sheet.
Halpenny, L.C., 1951, Preliminary report on the ground-water resources of the Navajo and Hopi Indian reservations Arizona, New Mexico, and Utah: U.S. Geological Survey Open-File Report [unnumbered], 13 p., 1 sheet.
Climate, Hydrogeology, Aquifer,