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United Nations Environment Programme ,  [Marine Litter: A Global Challenge] ,  Marine Litter: A Global Challenge

United Nations Environment Programme ,  Stiles, Daniel ,  [Listening to the People: Social Aspects of Dryland Management - Proceedings of an International Workshop] ,  Listening to the People: Social Aspects of Dryland Management - Proceedings of an International Workshop

United Nations Environment Programme ,  [The Siren Number 45 - March 1992] ,  The Siren Number 45 - March 1992

United Nations Environment Programme ,  [Achievements and Planned Development of UNEP’s Regional Seas Programme and Comparable Programmes Sponsored by Other Bodies. UNEP Regional Seas Reports and Studies No. 001] ,  Achievements and Planned Development of UNEP’s Regional Seas Programme and Comparable Programmes Sponsored by Other Bodies. UNEP Regional Seas Reports and Studies No. 001

United Nations Environment Programme ,  [Our Common Seas: Coasts in Crisis] ,  Our Common Seas: Coasts in Crisis