[Reports] / Amer.inst.of aeronautics and astronautics. N 90-3219 : Aging fleet structures working group activities : Rep.presented at the AIAA/AHS/ASEE aircraft design,systems and operations conf.,Sept.17-19 1990,Dayton,Oh. / T.Comerford, 1990. - 12 p. - Текст : непосредственный.