Force E.R. Manganese contents of some sedimentary rocks of Paleozoic age in Virginia / E. R. Force, L. J. Cox, 1991. - III,A9,B16 с с. - Текст : непосредственный.
Force E.R. Heavy-mineral dispersal and deposition in Sandy Deltas of Glacial Lake Quinebaug,Connecticut / E.R.Force,B.D.Stone, 1990. - 21 p. - Текст : непосредственный.
Force E.R. Structural context of mid-Tertiary mineralization in the Mammoth and San Manuel districts,southeastern Arizona : Three generations of extensional faulting and associated tilting affected mid-Tertiary mineralization of the Mammoth vein set and the newly described Shultz Spring altered area / E.R.Force,L.J.Cox, 1992. - 28 p. - Текст : непосредственный.
Force E.R. The Bisbee Group of the Tombstone Hills,southeastern Arizona-stratigraphy,structure,metamorphism,and mineralization / E.R.Force, 1996. - IV,22 p. p. - Текст : непосредственный.
Force E.R. Geologic evolution of Trail Ridge eolian heavy-mineral sand and underlying peat, northern Florida / E.R.Force,F.J.Rich, 1989. - III,16 p. p. - Текст : непосредственный.