5" heavy pressure valve, technical drawing, April 8, 1927; (https://texashistory.unt.edu/ark:/67531/metapth1187709/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
5" heavy pressure valve, technical drawing, April 8, 1927; (https://texashistory.unt.edu/ark:/67531/metapth1187709/m1/1/: accessed July 12, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .