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United Nations Environment Programme ,  [World Map of Present-Day Landscapes : An Explanatory Note] ,  World Map of Present-Day Landscapes : An Explanatory Note

United Nations Environment Programme ,  [The Marine and Coastal Environment of the West and Central African Region and its State of Pollution - UNEP Regional Seas Reports and Studies No. 46] ,  The Marine and Coastal Environment of the West and Central African Region and its State of Pollution - UNEP Regional Seas Reports and Studies No. 46

United Nations Environment Programme ,  International Union for Conservation of Nature and Natural Resources (IUCN) ,  Conservation Monitoring Centre (CMC) ,  [Coral Reefs of the World Volume 2: Indian Ocean, Red Sea and Gulf] ,  Coral Reefs of the World Volume 2: Indian Ocean, Red Sea and Gulf

United Nations Environment Programme ,  [Pollutants from land-based sources in the Mediterranean - UNEP Regional Seas Reports and Studies No. 32] ,  Pollutants from land-based sources in the Mediterranean - UNEP Regional Seas Reports and Studies No. 32