RF series : fixed service: CCIR recommendations: (new and revised as of 8 March 1992) / International Telecommunication Union
RFS series : frequency sharing and coordination between the fixed-satellite service and the fixed service: CCIR recommendations (new and revised as of 6 March 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
RPN series : propagation in non-ionized media: CCIR recommendations (new and revised as of 8 October 1992) / International Telecommunication Union