00719nam0-22002651i-450-990000062550403321000006255FED01000006255(Aleph)000006255FED0100000625520011111d--------km-y0itay50------baitay-------001yyEtude de quelques problemes de radiotelegraphieH. de Bellescize.ParisGauthier-Villars et C.1920174 p.ill.25 cm621.384 2Bellescize,Henri : deITUNINARICAUNIMARCBK99000006255040332113 L 13 173997FINBCFINBCUNINAING01