Khác biệt giữa bản sửa đổi của “North American X-15”

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* Hallion, Dr. Richard P. "Saga of the Rocket Ships." ''AirEnthusiast Six,'' March–June 1978. Bromley, Kent, UK: Pilot Press Ltd.

* Jenkins, Dennis R. ''Space Shuttle: The History of the National Space Transportation System: The First 100 Missions, 3rd edition''. Stillwater, Minnesota: Voyageur Press, 2001. ISBN 0-9633974-5-1.

* [http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19680016245_1968016245.pdf "Thermal protection system X-15A-2 Design report."] ''NASA'' report 1968 (PDF format).

* Thompson, Milton O. and Neil Armstrong. ''At the Edge of Space: The X-15 Flight Program''. Washington, DC: Smithsonian Institution Press, 1992. ISBN 1-56098-107-5.

* Tregaskis, Richard. ''X-15 Diary: The Story of America's First Space Ship''. Lincoln, Nebraska: iUniverse.com, 2000. ISBN 0-595-00250-1.

* ''United States Air Force Museum Guidebook''. Wright-Patterson AFB, Ohio: Air Force Museum Foundation, 1975.

* [http://www.aeronautics.nasa.gov/ebooks/downloads/X_15_Frontier_of_Flight.pdf "X-15: Extending the Frontiers of Flight."] ''NASA'' (PDF format).

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