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<a href="https://en.wikipedia.org/wiki/User:Gr1st" class="extiw" title="en:User:Gr1st">Gr1st</a> at <a class="external text" href="https://en.wikipedia.org">en.wikipedia</a>
1 April 2008 (original upload date); 25 August 2008 (last version)
<a rel="nofollow" class="external text" href="https://web.archive.org/web/20080911033446/http://www.annualreport2007.telekom.de/gb07/backstage_04/documentpool/en/en.pdf">Deutsche Telekom Annual Report 2007</a>