United States atlas: maps and charts accompanying the case and counter case of the United States, by the Alaskan Boundary Tribunal, and published by the United States Government Printing Office, Washington, D.C., 1904.
Upper right margin: U.S.G.S. Bulletin no. 251. pl. XVI. "Topography by T.G. Gerdine & R.B. Oliver." "Based on route surveys, Eagle to Fairbanks via Fortymile and Goodpaster Rivers, Fairbanks to Circle, and... from maps of U.S. Geological...