Journal of the House of Representatives of the Sixtieth Legislature of the State of Texas, Regular Session, Volume 2, and First Called Session, legislative document, 1966; (https://texashistory.unt.edu/ark:/67531/metapth193875/m1/1/: accessed June 6, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .