Commission d'études 1, 12, 5, 6, 7 : questions du CCIR, 1990: volume XV-1 / International Telecommunication Union
Study groups 8 : questions of the CCIR, 1990: volume XV-2 / International Telecommunication Union
Commission d'études 4, 9 : questions du CCIR, 1990: volume XV-4 / International Telecommunication Union
1995 RA series : radioastronomy: ITU-R recommendations (revised as of 21 October 1995) / International Telecommunication Union