Mineral resources of the Diablo Mountain Wilderness Study Area, Lake County, Oregon / M. F. Diggles, H. D. King, M. E. Gettings, 1990. - 22 p. - Текст : непосредственный.
Mineral resources of the Mill Creek Canyon Wilderness study area,Grand County,Utah / M.F.Diggles,J.E.Case,H.N.Barton и др., 1990. - V,F20 p. p. - Текст : непосредственный.
Diggles M.F. Mineral resources of the Rockhouse Wilderness study area, Kern and Tulare Counties, California / M.F.Diggles,R.C.Jachens,T.J.Peters, 1989. - 20 p. - Текст : непосредственный.