1913. National Highways Association. Relief shown by shading and contours. Includes information on population to be served by proposed roads. "October 1913." 23 x 21 centimeters Sc... National Highways Association (Washington).
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1916. National Highways Association. Cartographic Details: Scale approximately 1:1,560,000 (W 97 ̊15 ́--W 89 ̊30 ́/N 49 ̊23 ́--N 43 ̊30)́. In upper margin: Good roads everywhere : four... The Association (Washington, D.C.).
1916. National Highways Association. Includes information on the population to be served and other notes.; "Good roads everywhere, four fold system of highways."; "April 1916." 32 x 54... National Highways Association (Washington, D.C).
1913. National Highways Association. Published under direction of General Coleman du Pont, Chairman Board of Councillors.; "This map shows tentative locations for a national highways s... National Highways Association (Washington, D.C).
1914. National Highways Association. Relief shown by shading.; This map shows tentative locations for part of a National Highways system. 26 x 46 centimeters Scale 1:1,000,000 General ... The Association (Washington, D.C).
1926. National Highways Association. Bordered by textual information associated with the National Highways Association.; "4 fold system of highways."; "Facts in the history of road bui... National Highways Association (Washington, D.C).
1928. National Highways Association. Relief shown by hachures.; Includes text and inset of "Northeastern Maine." 112 x 76 centimeters Scale approximately 1:500,000 General Map Collection. (Washington, D.C., ), 1928.
1929. National Highways Association. Bordered by texts describing the organization and work of the Oregon Trail Memorial Association, Inc.; Caption title: Good roads everwhere--four fo... A. Hoen & Co (Baltimore, MD).