Butler, Mrs. Payton. [Letter from Mrs. Payton Butler to Edwina Murphy - April 14, 1976], letter, April 14, 1976; (https://texashistory.unt.edu/ark:/67531/metapth305468/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .