Bullock, J.H., Jr., Vaughn, R.B., Smith, D.B., Welsch, E., and Fey, D.L., 1989, Analytical results and sample locality map of stream-sediment, heavy-mineral-concentrate, and rock samples from the Trigo Mountain Wilderness Study Area (AZ-050-023B), La Paz County, Arizona: U.S. Geological Survey Open-File Report 89-0472, 24 p., 1 sheet, scale 1:50,000.
