RIS series : Inter-service sharing and compatibility: CCIR recommendations (as of 29September 1992) / International Telecommunication Union
RM series : mobile , radiodetermination, amateur and related satellite services: CCIR recommendations (new and revised as of 22 September 1992) / International Telecommunication Union
RS series : fixed-satellite service: CCIR recommendations (new and revised as of 7 March 1992) / International Telecommunication Union
RSM series : spectrum management: CCIR recommendations (new and revised as of 30 September 1992) / International Telecommunication Union