McMillen, Mrs. T. E. [Postcard from Mrs. T. E. McMillen to Edna Matlock], postcard, 191u-12-13; (https://texashistory.unt.edu/ark:/67531/metapth752620/m1/1/: accessed July 9, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .