Type Delivery Machine, patent, December 14, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859882/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
Type Delivery Machine, patent, December 14, 1915; (https://texashistory.unt.edu/ark:/67531/metapth859882/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .