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SP-4012 NASA HISTORICAL DATA BOOK: VOLUME III
- PROGRAMS AND PROJECTS 1969-1978
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Figure 1-2. NASA Space Transportation Systems, 1978. At
the end of NASA's second decade, the agency was looking at these four
vehicles to provide most of the civilian launches during the 1980s.
Advanced planners were predicting that the reusable Shuttle would
eventually make conventional expendable boosters obsolete.
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