Figure Toy., patent, August 21, 1917; (https://texashistory.unt.edu/ark:/67531/metapth853711/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Figure Toy., patent, August 21, 1917; (https://texashistory.unt.edu/ark:/67531/metapth853711/m1/1/: accessed July 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .