[Reports] / Amer.inst.of aeronautics and astronautics. N 89-2029 : Overview of the helicopter industry : Rep. presented at the AIAA/AHS/ASEE aircraft design, systems a. operations conf., July 31 - Aug.2, 1989, Seattle(Wa) / J.Zugschwert, 1989. - 3 p. - Текст : непосредственный.