1.5" heavy pressure valve, technical drawing, April 8, 1927; (https://texashistory.unt.edu/ark:/67531/metapth1187666/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
1.5" heavy pressure valve, technical drawing, April 8, 1927; (https://texashistory.unt.edu/ark:/67531/metapth1187666/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .