National Supply Company of Texas. [Invoice From the National Supply Company to Jake L. Hamon, Jr., March 7, 1925], text, March 7, 1925; (https://texashistory.unt.edu/ark:/67531/metapth1156021/m1/1/: accessed July 1, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .