01884oam 2200613 450 991071680070332120220118105341.0(CKB)5470000002524164(OCoLC)761133899(OCoLC)995470000002524164(EXLCZ)99547000000252416420111115d1969 ua 0engur|||||||||||txtrdacontentcrdamediacrrdacarrierRound trip trajectories with stopovers at both Mars and Venus /by E.A. Willis, Jr. and J.A. Padrutt[Washington, D.C.] :National Aeronautics and Space Administration,1969.1 online resource (approximately 11 pages) illustrationsNASA/TM ;X-52680Includes bibliographical references (page 6).Space trajectoriesInterplanetary voyagesInterplanetary voyagesfastSpace trajectoriesfastTrajectoriesnasatMars (planet)nasatVenus (planet)nasatSpace trajectories.Interplanetary voyages.Interplanetary voyages.Space trajectories.Trajectories.Mars (planet)Venus (planet)Willis Edward A.1399825Padrutt J. A.United States.National Aeronautics and Space Administration,OCLCEOCLCEOCLCQOCLCFOCLCOOCLCQGPOOCLCOOCLCQOCLCOGPOBOOK9910716800703321Round trip trajectories with stopovers at both Mars and Venus3512670UNINA