Maps showing ground-water conditions in the Lower San Pedro Basin area, Pinal, Cochise, Pima, and Graham Counties, Arizona-1979

Jones, S.C., 1980, Maps showing ground-water conditions in the Lower San Pedro Basin area, Pinal, Cochise, Pima, and Graham Counties, Arizona-1979: U.S. Geological Survey Water-Resources Investigations Open-File Report 80-0954, 1 sheet, scale 1:32,000