Mineral resources of the Kofa Unit 4 North Wilderness Study Area,Yuma County,Arizona / D.R.Sherrod,D.B.Smith,M.D.Kleinkopf,D.D.Gese, 1990. - 12 p. - Текст : непосредственный.
Mineral resources of the New Water mountains Wilderness study area, La Paz County, Arizona / D.R.Sherrod,D.B.Smith,R.D.Koch и др., 1989. - V,18 p. p. - Текст : непосредственный.
Mineral resources of the Muggins mountains study area, Yuma County, Arizona / D.B.Smith,R.M.Tosdal,J.A.Pitkin и др., 1989. - V,16 p. p. - Текст : непосредственный.