Spark-Plug Attachment, patent, July 15, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1257898/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Spark-Plug Attachment, patent, July 15, 1918; (https://texashistory.unt.edu/ark:/67531/metapth1257898/m1/1/: accessed May 21, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .