Summary of Single Vehicle Involved Accidents in the State of Texas for [the] First Six Months [of] 1991, report, July 20, 1991; (https://texashistory.unt.edu/ark:/67531/metapth1586281/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .