Counter., patent, July 18, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1257257/m1/1/: accessed July 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Counter., patent, July 18, 1922; (https://texashistory.unt.edu/ark:/67531/metapth1257257/m1/1/: accessed July 3, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .