Apparatus For Cementing Wells., patent, November 21, 1899; (https://texashistory.unt.edu/ark:/67531/metapth510600/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Apparatus For Cementing Wells., patent, November 21, 1899; (https://texashistory.unt.edu/ark:/67531/metapth510600/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .