00699oam 2200169z- 450 9910707942403321(CKB)5470000002469146(EXLCZ)99547000000246914620230509c2016uuuu -u- -engConventional and bimodal nuclear thermal rocket (NTR) artificial gravity Mars transfer vehicle conceptsCleveland, OhioNational Aeronautics and Space Administration, Glenn Research CenterConventional and bimodal nuclear thermal rocket BOOK9910707942403321Conventional and bimodal nuclear thermal rocket (NTR) artificial gravity Mars transfer vehicle concepts3329086UNINA