1911. George F. Cram Company and Minnesota. Office of Railroad and Warehouse Commissioners. Cartographic Details: Scale approximately 1:633,600 (W 97°15'--W 89°30'/N 50°00'--N 43° 30') Insets: Vicinity of Duluth & Superior, Wis. -- Vic... George F. Cram (Chicago, Ill.), 1909.