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  • ...ientificcommons.org/ Scientific Commons] - May or may not have free online papers. Search for [http://www.scientificcommons.org/#search_string=solar%20sail " ...s.nasa.gov NASA Technical Report Server] - May or may not have free online papers. Simple search for [http://ntrs.nasa.gov/search.jsp?N=0&Ntk=all&Ntx=mode%20
    2 KB (350 words) - 16:18, 20 June 2012

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