Barnes, R.L., 1997, Maps showing groundwater conditions in the Upper San Pedro Basin, Cochise, Graham, and Santa Cruz Counties Arizona--1990: Arizona Department of Water Resources Hydrologic Map Series Report no. 31, 2 sheets, scale 1:250,000.
Barnes, R.L., 1997, Maps showing groundwater conditions in the Upper San Pedro Basin, Cochise, Graham, and Santa Cruz Counties Arizona--1990: Arizona Department of Water Resources Hydrologic Map Series Report no. 31, 2 sheets, scale 1:250,000.