Chaffee, M.A., 1990, Geochemistry, in Peterson, J.A., ed., Preliminary mineral resource assessment of the Tucson and Nogales 1o by 2o quadrangles, Arizona: U.S. Geological Survey Open-File Report 90-0276, p. 19-40.
Chaffee, M.A., 1990, Geochemistry, in Peterson, J.A., ed., Preliminary mineral resource assessment of the Tucson and Nogales 1o by 2o quadrangles, Arizona: U.S. Geological Survey Open-File Report 90-0276, p. 19-40.
Geochemical Survey, Alluvium, Groundwater, Surface Water,