Harris, R.C., 1996, Index of geologic maps of the San Carlos - Safford - Duncan Nonpoint-Source Management Zone: Arizona Geological Survey Open-File Report 96-19, 11 p., 2 sheets, scale 1:500,000.
Harris, R.C., 1996, Index of geologic maps of the San Carlos - Safford - Duncan Nonpoint-Source Management Zone: Arizona Geological Survey Open-File Report 96-19, 11 p., 2 sheets, scale 1:500,000.
Map Index,