Whipkey C.E. Uplift of the Bighorn Mountains, Wyoming and Montana- a sandstone provenance study / C.E.Whipkey,V.V.Cavaroc,R.M.Flores, 1991. - 20 p. - Текст : непосредственный.
Cavaroc V.V. Red beds of the Triassic Chugwater group, southwestern Powder River Basin, Wyoming / V.V.Cavaroc,R.M.Flores, 1991. - IV,17 p. p. - Текст : непосредственный.