HD 560 .3 S1 : methods of measurement on radio receivers for various classes of emission: part 3: receivers for amplitude-modulated sound-broadcasting emissions: (IEC 315-3: 1989) / European Commitee for Electrothecnical Standardization
HD 608 S1 : July 1992: generic specification for symmetric pair/quad and multicore cables for digital communication / European Commitee for Electrothecnical Standardization
HD 609 S1 : November 1995: sectional specification for equipment cables to be used for digital and analogue communication / European Commitee for Electrothecnical Standardization
HD 609 S1 : Novembre 1992: specification intermédiaire pour câbles d' équipement destinés à la communication numérique et analogue / Comité Européen de Normalisation Electrotechnique