[Reports] / Amer.inst.of aeronautics and astronautics. N 89-2748 : Design challenges for the advanced launch system : Rep. presented at the AIAA/ASME/SAE/ASEE 25th joint propulsion conf.,Monterey(Ca),July 10-12,1989 / A.J.Stofan,S.J.Isakowitz, 1989. - 24 p. - Текст : непосредственный.