National Highways AssociationPublished under direction of General Coleman du Pont, Chairman Board of Councillors.; "This map shows tentative locations for a national highways system."; Includes color coded key to individual highways and ill.43 x 70 centimeters, on sheet 66 x 91 centimetersJPEGUMN_ALMA:9952858630001701engNational Highways Association (Washington, D.C)PublicNational highways system -- fifty thousand miles -- main trunk and link lines proposed by the National Highways AssociationMapsUniversity of Minnesota