00746nam0-2200265---450-99000837495040332120060912112503.0000837495FED01000837495(Aleph)000837495FED0100083749520060912d1971----km-y0itay50------bafreUS--------001yy<<L'>>avenir des communications par satellitesInstitutions et structuresNew YorkThe Twentieth Century Fund197132 p.23 cmITUNINARICAUNIMARCBK990008374950403321DI 5/5184299DECDECAvenir des communications par satellites723699UNINA