[Worn part from an H-40 after a 150-hour ground run test]
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[Worn part from an H-40 after a 150-hour ground run test], photograph, July 28, 1958; (digital.library.unt.edu/ark:/67531/metadc949911/: accessed June 24, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Special Collections.