Needle for Graphophones and the Like., patent, April 9, 1907; (https://texashistory.unt.edu/ark:/67531/metapth510797/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Needle for Graphophones and the Like., patent, April 9, 1907; (https://texashistory.unt.edu/ark:/67531/metapth510797/m1/1/: accessed June 20, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .