Armor Unit for Gunners, patent, November 28, 1916; (https://texashistory.unt.edu/ark:/67531/metapth858637/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Armor Unit for Gunners, patent, November 28, 1916; (https://texashistory.unt.edu/ark:/67531/metapth858637/m1/1/: accessed June 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .