Gas Pipeline Safety Rules, book, March 1985; (https://texashistory.unt.edu/ark:/67531/metapth1544623/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Gas Pipeline Safety Rules, book, March 1985; (https://texashistory.unt.edu/ark:/67531/metapth1544623/m1/1/: accessed July 5, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .