Keywords: Official Map - Nebraska State Highway System (1937).png en Official 1937 map of the Nebraska state highway system; as published by the State of Nebraska Department of Roads Irrigation Bureau of Roads and Bridges 1937-08-01 http //www transportation nebraska gov/maps/historical/pdf/1937 20Map pdf Nebraska Department of Roads Irrigation other versions Custom license marker 2015 05 23 PD-EdictGov Uploaded with UploadWizard Nebraska in the 1930s Maps of the history of the United States Maps of Nebraska |