Carton., patent, September 2, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1259341/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Carton., patent, September 2, 1919; (https://texashistory.unt.edu/ark:/67531/metapth1259341/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .