Texas. Department of Transportation. Construction and Maintenance Division. Texas Construction and Maintenance Report: January 1988, report, January 1, 1998; (https://texashistory.unt.edu/ark:/67531/metapth1032426/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .

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