О6
A23	Aerospace sentury XXI: space missions and policy. Vol.64. P.I. Advances in the Astronautical sciences [Текст] : Poceedings of the 33rd Annual AAS Int. Conf. held October 26-29, 1986,at Boulder, Colorado / Ed. by G.W.Morenthaler, G.L.May. — San Diego : AAS, 1987. — 700с.