U.S. Geological Survey, 1973, Availability of ground water in the Navajo and Hopi Indian Reservations, in Geological Survey research 1973: U.S. Geological Survey Professional Paper 850, p. 102.
U.S. Geological Survey, 1973, Availability of ground water in the Navajo and Hopi Indian Reservations, in Geological Survey research 1973: U.S. Geological Survey Professional Paper 850, p. 102.
Groundwater, Hydrogeology, Geochemical Survey,