1926. United States. Bureau of Public Roads. Shows Federal Aid Highway System, portions of System improved and under construction and national parks.; "Data corrected to Dec. 31, 1926." sheets... U.S. Geological Survey (Washington, D.C).
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1926. United States. Bureau of Public Roads. Shows Federal Aid Highway System, portions of System improved and under construction and national parks.; "Data corrected to Dec. 31, 1926." sheets... U.S. Geological Survey (Washington, D.C).