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United Nations Environment Programme ,  [Gems-Water: Report of a Workshop on Water Quality Monitoring and Assessment - Report Series No. 12] ,  Gems-Water: Report of a Workshop on Water Quality Monitoring and Assessment - Report Series No. 12

United Nations Environment Programme ,  [Eutrosym '76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water - Vol. I, Part 1] ,  Eutrosym '76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water - Vol. I, Part 1

United Nations Environment Programme ,  Institute of Water Management of the Ministry of Environmental Protection and Water Management of the German Democratic Republic ,  [Eutrosym ‘76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water - Vol. II] ,  Eutrosym ‘76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water - Vol. II

United Nations Environment Programme ,  Institute of Water Management of the Ministry of Environmental Protection and Water Management of the German Democratic Republic ,  [Eutrosym ‘76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water – Vol. IV] ,  Eutrosym ‘76: Proceedings the International Symposium on Eutrophication and Rehabilitation of Surface Water – Vol. IV

United Nations Development Programme ,  United Nations Environment Programme ,  United Nations Department of Technical Cooperation Development ,  [Transnational Project on the Major Regional Aquifer in North-East Africa: Proceedings of project Workshop] ,  Transnational Project on the Major Regional Aquifer in North-East Africa: Proceedings of project Workshop

United Nations Educational, Scientific and Cultural Organization ,  United Nations Environment Programme ,  [The Impact of Large Water Projects on the Environment - Proceedings of an International Symposium] ,  The Impact of Large Water Projects on the Environment - Proceedings of an International Symposium

United Nations Environment Programme ,  International Lake Environment Committee Foundation (ILEC) ,  [International Shiga Forum on Technology for Water Management in the 21st Century - Proceedings] ,  International Shiga Forum on Technology for Water Management in the 21st Century - Proceedings