Topographic reconnaissance map of Upper Tanana River Valley region, Alaska / U.S. Geological Survey; Alfred H. Brooks in charge of division; Control and topography by D.C. Witherspoon and J.W. Bagley; Upper Tanana River from boat traverses by W.J. Peters.Geological Survey (U.S.)1922"Surveyed 1898, 1907, 1908."Includes inset responsibility map.Relief shown by contours and spot heights.cartographic