1995 TF series : time signals and frequency standards emissions: ITU-R recommendations (new and revised as of 21 October 1995) / International Telecommunication Union
Time signals and frequency standards emissions : supplement 1 to volume 1997 TF series / ITU-R
1994 V series : vocabulary and related subjects: ITU-R recommendations / ITU-R
1997 V Series : vocabulary and related subjects / ITU-R