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2. The decision to develop the space shuttle;Logsdon;Space Policy,1986
3. A reappraisal of the space shuttle programme;Pielke;Space Policy,1993
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5. Heppenheimer TA. The space shuttle decision: NASA's search for a reusable space vehicle. Washington, DC: NASA History Office; 1999 (especially Chapters 6, 8, and 9).