McAulay, John E.; Braithwaite, Willis M. & Ciepluch, Carl C. Turbine Failure Investigation of J65-W-4 Turbojet Engine in an Altitude Test Chamber, report, September 21, 1956; (https://digital.library.unt.edu/ark:/67531/metadc53229/m1/1/: accessed April 26, 2024), University of North Texas Libraries, UNT Digital Library, digital.library.unt.edu; .