Marcello, Ronald E. & Hughes, Robert C. Oral History Interview with Robert C. Hughes, August 5, 1978, book, August 5, 1978; (https://texashistory.unt.edu/ark:/67531/metadc306943/m1/1/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .