ヒュー・グラス
William H. Ashley and the Rocky Mountain Fur Company, 1822-26
Myers, John Myers (1976). Saga of Hugh Glass: Pirate, Pawnee and Mountain Man. ISBN 0-8032-5834-8
Ashley, William Henry; Johnson, Donald R. (1981). British establishments on the Columbia & the state of the fur trade. Fairfield, Washington: Ye Galleon Press
Clokey, Richard M (1990-8). William H. Ashley : enterprise and politics in the trans-Mississippi West. Norman: University of Oklahoma Press
McClung, Robert M. (1990-11). Hugh Glass, Mountain Man. William Morrow & Co. ISBN 978-0-6880-8092-1