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    Comparison of Solar Electric and Chemical Propulsion Missions

    Freeh, Joshua E. / Burke, Laura M. / Sjauw, Waldy K. et al. | NTRS | 2015
    Publisher: Eleven International Publishing

    Proceedings of the International Institute of Space Law 2017

    IISL Colloquium on the Law of Outer Space / International Institute of Space Law | TIBKAT | 2018
    Publisher: Eleven International Publishing , The Hague, the Netherlands