Texas Register, Volume 32, Number 15, Pages 2069-2218, April 13, 2007, periodical, April 13, 2007; (https://texashistory.unt.edu/ark:/67531/metapth97392/m1/1/: accessed April 24, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .