Friedman I. Monitoring of thermal activity in Southwestern Yellowstone National Park and Vicinity,1980-1993 / I.Friedman,D.R.Norton,R.A.Hutchinson, 1993. - 19 p. - Текст : непосредственный.
field-trip guide to Yellowstone National Park,Wyoming,Montana, and Idaho - volcanic,hydrothermal, and glacial activity in the region / R.O.Fournier,R.L.Christiansen,R.A.Hutchinson,K.L.Pierce, 1994. - VII,46 p. p. - Текст : непосредственный.