In the international standard classification, ra.769 involves: .
International Telecommunication Union (ITU), ra.769
ITU-R REPORT RA.2131-2008 Supplementary information on the detrimental threshold levels of interference to radio astronomy observations in Recommendation ITU-R RA.769
ITU-R - International Telecommunication Union/ITU Radiocommunication Sector, ra.769
REPORT RA.2131-2008 Supplementary information on the detrimental threshold levels of interference to radio astronomy observations in Recommendation ITU-R RA.769