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- Exchange of notes constituting an agreement between Canada and the United States of America authorizing the Canadian entitlement purchase agreement (Columbia River Basin)
- Kingdom of Cambodia
- Convention between Senegal and Gambia. Bathurst, 18 February, 1965
- Agreement between the government of the Federal People's Republic of Yugoslavia and the government of the People's Republic of Albania concerning water economy questions (1956)
- Agreement between the governments of the Republic of Angola, the Republic of Botswana, and the Republic of Namibia on the establishment of a permanent Okavango River Basin Water Commission (OKACOM)
- Statute of the Organization of Senegal River States
- Convention on the protection of the Rhine
- Convention concerning protection of the waters of Lake Geneva against pollution
- Agreement concerning the utilization of the rapids of the Uruguay River in the Salto Grande area
- Convention between the French Republic and the Swiss Confederation concerning the Emosson hydro-electric facility
- Memorandum of Understanding to establish a Volta Basin Authority