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    In-Space Propulsion Program Overview and Status

    Carroll, Carol / Johnson, Les / Baggett, Randy | NTRS | 2002

    Exploring the Solar System

    Johnson, Les | NTRS | 2003

    NASA's In-Space Propulsion Program

    Johnson, Les | NTRS | 2003

    In-Space Propulsion Program Overview and Status

    Wercinski, Paul F. / Johnson, Les / Baggett, Randy M. | NTRS | 2003

    NASA's In-Space Propulsion Technology Program: Overview and Status

    Johnson, Les / Alexander, Leslie / Baggett, Randy et al. | NTRS | 2004

    In-Space Propulsion for Science and Exploration

    Bishop-Behel, Karen / Johnson, Les | NTRS | 2004

    NASA's In-Space Propulsion Technology Program: Overview and Update

    Johnson, Les / Alexander, Leslie / Baggett, Randy M. et al. | NTRS | 2004

    NASA In-Space Propulsion Technology Program: Overview and Update

    Johnson, Les / Alexander, Leslie / Baggett, Randy M. et al. | NTRS | 2004

    NASA's In-Space Propulsion Technology Program: A Step Toward Interstellar Exploration

    Johnson, Les / James, Bonnie / Baggett, Randy et al. | NTRS | 2005

    Recent Advances in Solar Sail Propulsion at NASA

    Johnson, Les / Young, Roy M. / Montgomery, Edward E., IV | NTRS | 2006

    Status of Solar Sail Propulsion: Moving Toward an Interstellar Probe

    Johnson, Les / Young, Roy M. / Montgomery, Edward E., IV | NTRS | 2006

    In-Space Propulsion Technologies for Robotic Exploration of the Solar System

    Johnson, Les / Meyer, Rae Ann / Frame, Kyle | NTRS | 2006

    Holographic Solar Photon Thrusters

    Johnson, Les / Matloff, Greg | NTRS | 2006

    NASA Solar Sail Propulsion Technology Development

    Johnson, Les / Montgomery, Edward E. / Young, Roy et al. | NTRS | 2007

    Fortissimo: A Japanese Space Test Of Bare Wire Anode Tethers

    Johnson, Les / Fujii, H. A. / Sanmartin, J. R. | NTRS | 2008

    Solar Sailing

    Johnson, Les / Montgomery, Edward E. / Young, Roy et al. | NTRS | 2008