A History of the Northern Cheyenne Chiefs and Warrior Societies, 1830-1879, with an Epilogue 1969-1974, by Father Peter John Powell, Powell, Peter John, 1981, Dalla collezione di: Centro Studi Americani
Frontespizio Vol. I di People of the Sacred Mountain. A History of the Northern Cheyenne Chiefs and Warrior Societies, 1830-1879, with an Epilogue 1969-1974, by Father Peter John Powell, Powell, Peter John, 1981, Dalla collezione di: Centro Studi Americani