Texas. Legislature. House of Representatives. 79th Texas Legislature, Regular Session, House Bill 67, Chapter 19, legislative document, May 9, 2005; (https://texashistory.unt.edu/ark:/67531/metapth157138/m1/1/: accessed April 18, 2019), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .