Texas Register, Volume 5, Number 25, Pages 1229-1308, April 1, 1980, periodical, April 1, 1980; (https://texashistory.unt.edu/ark:/67531/metapth244622/m1/1/: accessed April 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .