Lens Mounting., patent, May 18, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1258911/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Lens Mounting., patent, May 18, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1258911/m1/1/: accessed June 22, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .