[Model of the 204 helicopter, front view], photograph, October 13, 1954; (https://texashistory.unt.edu/ark:/67531/metadc950107/m1/1/: accessed April 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
[Model of the 204 helicopter, front view], photograph, October 13, 1954; (https://texashistory.unt.edu/ark:/67531/metadc950107/m1/1/: accessed April 17, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .