International Telecommunication Union: Revision history

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20 October 2022

14 October 2022

21 June 2016

9 May 2016

30 March 2016

9 December 2015

12 December 2012

26 November 2012

24 May 2012

13 January 2012

2 December 2011

4 June 2011

12 April 2011

8 April 2011

5 April 2011

30 March 2011