Rotary Engine, patent, November 7, 1905; (https://texashistory.unt.edu/ark:/67531/metapth509707/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Rotary Engine, patent, November 7, 1905; (https://texashistory.unt.edu/ark:/67531/metapth509707/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .