00923nam0-22002891i-450-99000026117040332120120208181250.0000026117FED01000026117(Aleph)000026117FED0100002611720020821d1960----km-y0itay50------baengUSy-------001yySpace trajectoriesa symposium sponsored by the American Astronautical Society, the advanced research projects agency, and radiation incorporatededited by the technical staff, T.C. HelveyNew YorkAcademic Press1960X, 298 p.ill.24 cmMeccanica del volo spazialeHelvey,T. C.American Astronautical SocietyITUNINARICAUNIMARCBK99000026117040332109 036-0041007DINAEDINAEUNINA