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UNE 135274:2014 Road signalisation...
UNE 26422-2:1991 ROAD VEHICLES....
ITU-T E.130 Choice of the most useful and desirable supplementary telephone services
ITU-T E.131 Subscriber control procedures for supplementary telephone services
ITU-T E.132 Standardization of elements of control procedures for supplementary telephone services
ITU-T E.148 Routing of traffic by automatic transit exchanges
ITU-T E.165 Timetable for coordinated implementation of the full capability of the numbering plan for the ISDN era