H.J. Knight using a milling machine Side: 1 of 1
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H.J. Knight using a milling machine, photograph, October 8, 1952; (https://texashistory.unt.edu/ark:/67531/metapth40596/m1/1/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting Lockheed Martin Aeronautics Company, Fort Worth.