ヒュー・グラス
(1915). The Song of Hugh Glass (part of A Cycle of the West)
Dale, Morgan (1952). Jedediah Smith and the Opening of the American West
Manfred, Fredrick (1954). Lord Grizzly. ISBN 0-8032-8118-8
Ashley, Andrew; Henry (1964). Dale Lowell Morgan. ed. West of William H. Ashley: The International Struggle for the Fur Trade of the Missouri, the Rocky Mountains, and the Columbia, with Explorations Beyond the Continental Divide, Recorded in the Diaries and Letters of William H. Ashley and His Contemporaries, 1822-1838. Denver, Colorado: Fred S. Rosenstock / Old West Publishing Company
Ellingsberg, Richard S (1974).