Radio astronomy : supplément 1 au volume 2000 RA Series / International Telecommunication Union
RBO series : Broadcasting-satellite service (sound and television): CCIR recomendations: (new and revised as of 15 September 1992) / International Telecommunication Union
RBS series : Broadcasting service (sound): 1992 CCIR recommendations (new and revised as of 3 September 1992) / International Telecommunication Union
RBT series : broadcasting service (television): 1992 - CCIR recommendations (new and revised as of 15 September 1992) / International Telecommunication Union