title: The Mars direct plan.
authors.forename: R
authors.initials: R
authors.lastname: Zubrin
mesh_terms: D019443:Cosmic Dust; D018504:Ecological Systems, Closed; D055593:Geological Phenomena; D005844:Geology; D006112:Gravitation; D006801:Humans; D018535:Mars; D013026:Space Flight / Q000191:economics*; D018531:Spacecraft / Q000191:economics; D014481:United States; D018557:United States National Aeronautics and Space Administration
chemical_list: D019443:Cosmic Dust