ebook,National  Aeronautics and Space Administration (NASA), World  Spaceflight News, Dennis R.  Jenkins,Hypersonics Before the Shuttle: A Concise History of the X-15 Research Airplane - History of the Design, Development, Operations, and Lessons Learned,Progressive Management,SCIENCE / Astrophysics & Space Science,TECHNOLOGY & ENGINEERING / Aeronautics & Astronautics" />