21. Maps showing altitude of the potentiometric surface and changes in water level of the Sparta sand and Memphis sand aquifers in eastern Arkansas, spring 1985 Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: [Little Rock, Arkansas] : Department of the Interior, United States Geological Survey, 1986 Resource Type: Map Access & Availability: Loading
22. Maps showing recharge areas and quality of ground water for the Navajo Aquifer, western Washington County, Utah Author/Creator: Geological Survey (U.S.), cartographer Publication/Creation: Reston, Virginia : U.S. Department of the Interior, U.S. Geological Survey, 1993 Resource Type: Map Access & Availability: Loading