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    Propulsion by impinging laser beams.

    MOECKEL, W. E. | AIAA | 1972

    Electric propulsion

    Moeckel, W. E. | NTRS | 1963

    Electric propulsion.

    Moeckel, W. E. | NTRS | 1963

    Propulsion methods in astronautics

    Moeckel, W. E. | NTRS | 1958

    Propulsion by impinging laser beams.

    Moeckel, W. E. | NTRS | 1972