Thompson, Milton O., and James R. Welsh. ‘‘Flight Test Experience with Adaptive Control Systems.’’
Paper presented at the AGARD Guidance and Control and Flight Mechanics Panels, Oslo,
Norway, September 3–5, 1968.
Jenkins, Dennis R. Hypersonics Before the Shuttle: A Concise History of the X-15 Research Airplane.
Monographs in Aerospace History No. 18. Washington, D.C.: NASA, 2000.
Thompson, Milton O. Flight Research: Problems Encountered and What They Should Teach Us. Monographs
in Aerospace History No. 22. Washington, D.C.: NASA History Division, Office of Policy
and Plans, 2000.
Stillwell, Wendell H. X-15 Research Results. SP-60. Washington, D.C.: NASA Scientific and Technical
Information Office, NASA, 1964.
Meeting minutes, NACA Committee on Aerodynamics, NASA HQ, October 4–5, 1954.
Armstrong, Neil. ‘‘X-15 Operations: Electronics and the Pilot.’’ Astronautics 5 (May 1960): 42–43,