John Wesley Powell is the author of Report of Explorations in 1873 of the Colorado of the West and Its Tributaries, Indians West of the Rocky Mountains, Statement of Major J. W. Powell, Made Before the Committee on Indian Affairs..., Report of Special Commissioners J.W. Powell and G.W. Ingalls on the Condition of the Ute Indians of the Utah ; the Pai-Utes of Utah, Northern Arizona, Southern Nevada, and Southeastern California ; the Go-Si Utes of Utah and Nevada ; the Northwestern Shoshones of Idaho and Utah ; and the Western Shoshones of Nevada ; and Report Concerning Claims of Settlers in the Mo-a-pa Valley (Southeastern Nevada)., Report of Explorations in 1873 of the Colorado of the West and Its Tributaries Under the Direction of the Smithsonian Institution, Report on the Geographical and Geological Survey of the Rocky Mountain Region.