Childs, J. Howard & McCafferty, Richard J. Simulated Altitude Performance of Combustor of Westinghouse 19XB-1 Jet-Propulsion Engine, report, November 30, 1948; (https://digital.library.unt.edu/ark:/67531/metadc63928/m1/1/: accessed November 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .