Combination Well-Packer and Setting-Tool., patent, January 6, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1257735/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Combination Well-Packer and Setting-Tool., patent, January 6, 1920; (https://texashistory.unt.edu/ark:/67531/metapth1257735/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .