Turnstile., patent, June 9, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859511/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Turnstile., patent, June 9, 1914; (https://texashistory.unt.edu/ark:/67531/metapth859511/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .