Pesawat Ulang Alik Challenger: Perbedaan antara revisi
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{{Reflist}}
* {{Cite book |last = Evans |first =Ben |year =2007 |title = Space shuttle challenger: ten journeys into the unknown
|url =http://books.google.ca/books?id=MQjCF8Cc7HoC&lpg=PR1&dq=Space%20Sh
==External links==
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