Laut, A. C. (1923). Pathfinders of the West: Being the Thrilling Story of the Adventures of the Men Who Discovered the Great Northwest: Radisson, La Vérendrye, Lewis and Clark (p. xxv, 380 p. : Front., portr., pl. (h.t.), ill., cartes; 20 cm). New York : The Macmillan Co., 1923.
