[News Script: Ultimatum], script, March 13, 1970, 10:00 p.m.; (https://texashistory.unt.edu/ark:/67531/metadc1328320/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
[News Script: Ultimatum], script, March 13, 1970, 10:00 p.m.; (https://texashistory.unt.edu/ark:/67531/metadc1328320/m1/1/: accessed June 25, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .