Spreader for Telephone Receiver Casings, patent, December 10, 1912; (https://texashistory.unt.edu/ark:/67531/metapth508367/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
Spreader for Telephone Receiver Casings, patent, December 10, 1912; (https://texashistory.unt.edu/ark:/67531/metapth508367/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .