Copy Holder, patent, April 28, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858193/m1/1/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Copy Holder, patent, April 28, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858193/m1/1/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .