Chronology of Late Cretaceous igneous and hydrothermal events at the Golden Sunlight gold-silver breccia pipe,southwestern Montana / E.DeWitt,E.E.Foord,R.E.Zartman и др., 1996. - IV,48 p. p. - Текст : непосредственный.
Millen T.M. Lead isotopes from the Upper Mississipi Valley district-a regional perspective / T.M.Millen,R.E.Zartman,A.V.Heyl, 1995. - III,B13 p. p. - Текст : непосредственный.