Adrian, B.M., Smith, D.B., Hill, R.H., Roemer, T.A., Vaughn, R.B., and Delaney, T.A., 1986, Analytical results and sample locality maps of stream-sediment, heavy-mineral-concentrate, and rock samples from the Kofa National Wildlife Refuge, Yuma and La Paz counties, Arizona: U.S. Geological Survey Open-File Report 86-0199, 122 p., 2 sheets, scale 1:100,000.