01047nam0-22003011i-450-99000011278040332120030731141332.0000011278FED01000011278(Aleph)000011278FED0100001127820020821d--------km-y0itay50------baitay-------001yyAdvanced satellite communications systems using the 20-30 Ghz bandsProceedings of a symposium held at Genoa, Italy, 14-16 december 1977European space agencyParisEuropean space agencyAgence spatiale europeenne1977266 p.ill.30 cmESA SP138Satelliti per telecomunicazioniCongressi1977621.380 422ESA<European space agency>333242ITUNINARICAUNIMARCBK99000011278040332113 G 07 296182FINBCFINBCAdvanced satellite communications systems using the 20-30 Ghz bands115338UNINA