Mineral resources of the Mount Wilson Wilderness study area, Mohave County(Az) / R. C. Greene, R. G. Eppinger, J. R. Hassemer, 1989. - V,18 p. p. - Текст : непосредственный.
Mineral resources of the Cowboy Spring Wilderness study area, Hidalgo County, New Mexico / W.E.Brooks,J.R.Hassemer,J.S.Duval и др., 1989. - 11 p. - Текст : непосредственный.
Mineral resources of the Wabayuma Peak Wilderness Study Area, Mohave County, Arizona / C.M.Conway,J.R.Hassemer,D.H.Knepper и др., 1990. - VIII,52 p. p. - Текст : непосредственный.
Mineral resources of the Woolsey Peak Wilderness study area, Maricopa county, Arizona / J.A.Peterson,J.R.Hassemer,D.H.Knepper и др., 1989. - V,16 p. p. - Текст : непосредственный.
Mineral resources of the Eagletail mountains wildeness study area, La Paz Maricopa and Yuma Counties(Az) / R.J.Miller,F.Gray,J.R.Hassemer и др., 1989. - VI,G18 p. p. - Текст : непосредственный.
Mineral resources of the Signal Mountain wilderness study area, Maricopa County, Arizona / F.Gray,R.J.Miller,J.R.Hassemer и др., 1989. - 14 p. - Текст : непосредственный.