Texas Register, Volume 12, Number 46, Pages 1949-1989, June 19, 1987, periodical, June 19, 1987; (https://texashistory.unt.edu/ark:/67531/metapth243890/m1/5/: accessed July 10, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .