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    6th TVIW Interstellar Symposium & NASA Interstellar Propulsion Workshop

    Interstellar Symposium and Interstellar Propulsion Workshop / USA, National Aeronautics and Space Administration | TIBKAT | 2020

    100 YEAR STARSHIP STUDY 2011: EXTRAS - A Bridge to Far

    Halprin, Len | Online Contents | 2014