[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3959 : Instability of a supersonic shock-free elliptic jet : Rep.presented at the AIAA 13th aeroacoustics conf.,Oct.22-24,1990,Tallahassee(Fl) / R.S.Baty,J.M.Seiner,M.K.Ponton, 1990. - 14 p. - Текст : непосредственный.