Spring-Wheel., patent, April 23, 1907; (https://texashistory.unt.edu/ark:/67531/metapth514472/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Spring-Wheel., patent, April 23, 1907; (https://texashistory.unt.edu/ark:/67531/metapth514472/m1/2/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .