1. The Federal Aid Highway System progress map : [Eastern North Dakota, Central North Dakota, and Western North Dakota] Maps University Of Minnesota Public content 1927. United States. Bureau of Public Roads. Sheets numbered 28E, 28C, and 28W.; Base map from U.S. Geological Survey state map.; "Data corrected to Dec. 1, 1927." 71 x 137 centimeters, on she... The Bureau (Washington, D.C).