Lamp Adjusting Pedal Mechanism, patent, May 10, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859493/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Lamp Adjusting Pedal Mechanism, patent, May 10, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859493/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .