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.
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1913. 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.
1910. Clausen, A. C., Cram, George Franklin, 1841-1928, Elmquist, Charles Emil (1873-1948), George F. Cram Company, Mills, Ira B., Railroad and Warehouse Commission of the State of Minnesota, Staples, Chas. F., and Yapp, Thomas. Cartographic Details: Scale approximately 1:633,600. Also shows congressional districts. "Ira B. Mills, Chas. F. Staples, Chas. E. Elmquist, Railro... George F. Cram (Chicago, Ill.), 1909.
1914. Clausen, A. C., Cram, George Franklin, 1841-1928, Elmquist, Charles Emil (1873-1948), George F. Cram Company, Jacobson, Ole P.B., Mills, Ira B., Railroad and Warehouse Commission of the State of Minnesota, and Yapp, Thomas. Cartographic Details: Scale approximately 1:633,600. Also shows congressional districts. "Ira B. Mills, Chas. E. Elmquist, O.P.B. Jacobson, Railroa... George F. Cram (Chicago, Ill.), 1909.