Radio regulations : revised international table of frequency allocations and associated terms and definitions : [proceedings of the] International Telecommunication Union World Administrative Radio Conference, 1979.
World Administrative Radio Conference(1979 :Geneva)
Great Britain.Home Office.
London : H.M.S.O. [for the] Home Office,
1980.
'The World Administrative Radio Conference (WARC) of the International Telecommunications Union was held in Geneva from 24 September to 6 December 1979 ...' - Foreword
Radio frequency allocation.