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United Nations Environment Programme ,  [Proceedings of the International Symposium on Efficient Water Use in Urban Areas: Innovative Ways of Finding Water for Cities - IETC Report Series No. 9] ,  Proceedings of the International Symposium on Efficient Water Use in Urban Areas: Innovative Ways of Finding Water for Cities - IETC Report Series No. 9

United Nations Environment Programme ,  World Meteorological Organization ,  [International Conference on Water and the Environment: Development Issues for the 2lst century] ,  International Conference on Water and the Environment: Development Issues for the 2lst century