Metadata Search of ITU-R Recommendations / Reports is available by Series, Radio Category, Services, Cross reference , Responsible WPs, Approval year.
Frequency Search is available at the "Search ITU-R Recommendations by Frequency Range" (for ITU-R Recommendations) or "Search ITU-R Reports by Frequency Range"
(for ITU-R Reports). The link to the frequency search page is provided in each Metadata Search page.
Full Text Search
Full Text Search is available at the same page as frequency search page.