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https://ethiopiaobservatory.com/2015/04/01/the-khartoum-declaration-on-gerd-the-1997-un-convention-on-the-law-of-non-navigational-uses-of-international-watercourses/
The Khartoum Declaration on GERD & the 1997 UN Convention on the Law of Non-navigational Uses of International Watercourses