[News Script: Bell Helicopter], script, June 18, 1969; (https://texashistory.unt.edu/ark:/67531/metadc1142691/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[News Script: Bell Helicopter], script, June 18, 1969; (https://texashistory.unt.edu/ark:/67531/metadc1142691/m1/1/: accessed July 7, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .