Relief shown by form lines and spot heights. "Twentieth annual report; pt. 7, map no. 20." Lith. by A. Hoen & Co., Baltimore, MD. "Topography by Emil Mahlo, Lieutenant P. G. Lowe, U.S.A., and F. C. Schrader, U.S. Geological Survey."...
Relief shown by form lines and spot heights. "Twentieth annual report; pt. 7, map no. 20." Lith. by A. Hoen & Co., Baltimore, MD. "Topography by Emil Mahlo, Lieutenant P. G. Lowe, U.S.A., and F. C. Schrader, U.S. Geological...