[Reports] / Amer.inst.of aeronautics and astronautics. N 89-1115 : Far-field extrapolation of near-field acoustic measurement using inverse methods : Rep. presented at the AIAA 12th aeroacoustics conf., Apr.10-12, 1989/San Antonio(Tx) / G.Elias,F.Payen, 1989. - 8 p. - Текст : непосредственный.