Broadcasting-satellite service (sound and television) : supplement 1 to volume 1997 BO Series / ITU-R
Sound and television recording : supplement No.1 to volume 1997 BR Series / ITU-R
Broadcasting service (sound) : supplement 1 to volume 1997 BS Series / ITU-R
Broadcasting service (sound) : supplement 2 to volume 1997 BS Series / ITU-R