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United Nations Environment ProgrammeUnited Nations Educational Scientific and Cultural Organization[Evaluation of urban pollution of surficial and groundwater aquifers in Africa]Evaluation of urban pollution of surficial and groundwater aquifers in Africa

United Nations Environment ProgrammeIntergovernmental Oceanographic Commission of the United Nations Educational Scientific and Cultural Organization[Transboundary Waters Assessment Programme (TWAP) Vol. 1: Groundwater - Transboundary Aquifers and Groundwater Systems of Small Island Developing States: Status and Trends - Summary for Policy Makers]Transboundary Waters Assessment Programme (TWAP) Vol. 1: Groundwater - Transboundary Aquifers and Groundwater Systems of Small Island Developing States: Status and Trends - Summary for Policy Makers

United Nations Environment Programme[Transboundary Water Assessment Programme (TWAP) Vol. 6: Crosscutting Analysis - Transboundary Waters Systems: Status and Trends]Transboundary Water Assessment Programme (TWAP) Vol. 6: Crosscutting Analysis - Transboundary Waters Systems: Status and Trends

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