Street-Indicator for Cars, patent, February 10, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858989/m1/7/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Street-Indicator for Cars, patent, February 10, 1914; (https://texashistory.unt.edu/ark:/67531/metapth858989/m1/7/: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .