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National Research Council (U.S.). Division on Engineering and Physical Sciences, National Research Council (U.S.). Aeronautics and Space Engineering Board, National Research Council (U.S.). Committee for the Review of NASA's Pioneering Revolutionary Technology Program, and Inc ebrary. National Research Council Review of NASA's Pioneering Revolutionary Technology Program: Interim Report. Washington, DC: National Academy Press, 2003.

National Research Council (U.S.). Division on Engineering and Physical Sciences, et al. National Research Council Review of NASA's Pioneering Revolutionary Technology Program: Interim Report. National Academy Press, 2003.