Impact-Motor., patent, November 12, 1901; (https://texashistory.unt.edu/ark:/67531/metapth510107/m1/1/: accessed May 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Impact-Motor., patent, November 12, 1901; (https://texashistory.unt.edu/ark:/67531/metapth510107/m1/1/: accessed May 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .