RB-57F, Four-engine Jet, photograph, August 2, 1965; (https://texashistory.unt.edu/ark:/67531/metapth40284/m1/1/: accessed April 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .
RB-57F, Four-engine Jet, photograph, August 2, 1965; (https://texashistory.unt.edu/ark:/67531/metapth40284/m1/1/: accessed April 28, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu; .