Texas. Secretary of State. Texas Register, Volume 2, Number 7, Pages 229-274, January 25, 1977, periodical, January 25, 1977; (https://texashistory.unt.edu/ark:/67531/metapth252896/m1/1/: accessed November 22, 2018), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .