Significance of gold and silver in drainage samples from the vicinity of the Baboquivari Peak Wilderness Study Area, Pima County, Arizona
Nowlan, G.A., 1988, Significance of gold and silver in drainage samples from the vicinity of the Baboquivari Peak Wilderness Study Area, Pima County, Arizona: U.S. Geological Survey Open-File Report 88-0426, 13 p., 1 sheet, scale 1:50,000.