[Engine of H-40 on a hoist], photograph, April 8, 1958; (https://texashistory.unt.edu/ark:/67531/metadc949902/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .
[Engine of H-40 on a hoist], photograph, April 8, 1958; (https://texashistory.unt.edu/ark:/67531/metadc949902/m1/1/: accessed July 15, 2024), University of North Texas Libraries, The Portal to Texas History, texashistory.unt.edu.; .