Hansley P.L. Distribution and properties of clinoptilolite-bearing tuffs in the Upper Jurassic Morrison Formation on the Ute Mountain Ute Reservation,southwestern Colorado and northwestern New Mexico / P.L.Hansley,R.A.Sheppard, 1993. - III,A11 p. p. - Текст : непосредственный.
Sheppard R.A. Zeolitic diagenesis of tuffs in the Miocene Chalk Hills formation, western Snake River Plain, Idaho / R.A.Sheppard, 1991. - IV,27 p. p. - Текст : непосредственный.
Sheppard R.A. Zeolitic diagenesis of tuffs in Miocene lacustrine rocks near Harney Lake,Harney County,Oregon / R.A.Sheppard, 1994. - IV,28 p. p. - Текст : непосредственный.