Transiting from Air to Space:
The North American X-15
Robert S. Houston 
Richard P. Hallion 
Ronald G. Boston 
from
The Hypersonic Revolution
Case Studies in the History of Hypersonic Technology
Air Force History and Museums Program
1998 
A photo of the North American X-15 airplane
 
Table of Contents

Special thanks to Hans-Peter Engel, who formatted this document for the Web.
NASA History Homepage Updated October 22, 2004
Steve Garber, NASA History Web Curator
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