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United Nations Environment Programme ,  [Interactions of Biogeochemical Cycles in Aqueous Ecosystems Part 7] ,  Interactions of Biogeochemical Cycles in Aqueous Ecosystems Part 7

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 Environment Programme ,  U.S Environmental Protection Agency ,  Ministry of Housing, Spatial Planning and the Environment, The Netherlands ,  European Commission ,  Environmental Law Institute, United States ,  Environment Canada ,  The Environment Agency, England and Wales (United Kingdom) ,  The World Bank ,  [Fifth International Conference on Environmental Compliance and Enforcement: Conference - Proceedings Volume I] ,  Fifth International Conference on Environmental Compliance and Enforcement: Conference - Proceedings Volume I