English

United States system of highways : adopted for uniform marking by the American Association of State Highway Officials, November 11, 1926

1 map : 43 x 71 cm · Earliest-known U.S. road map to show numbered highway routes · "These routes are part of the Federal Aid Highway System approved by the Secretary of Agriculture." · In upper margin: Department of Agriculture, William M. Jardine, Secretary; Bureau of Public Roads, Thomas H. McDonald, Chief

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