Texas Register, Volume 31, Number 20, Pages 4117-4284, May 19, 2006, periodical, May 19, 2006; (https://texashistory.unt.edu/ark:/67531/metapth97345/m1/1/: accessed April 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .