[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3636 : Astrotech 21: a technology program for future astrophysics missions : Rep. presented at the AIAA space programs and technologies conf.,Sept.25-28,1990,Huntsville(Al.) / J.A.Cutts,G.P.Newton, 1990. - 7 p. - Текст : непосредственный.