Texas. Legislature. House of Representatives. Journal of the House of Representatives of the Regular Session of the Seventy-Second Legislature of the State of Texas, Volume 3, legislative document, 1991; (https://texashistory.unt.edu/ark:/67531/metapth145970/m1/19/: accessed December 14, 2017), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .