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United Nations Environment Programme ,  Joint Group of Experts on the Scientific Aspects of Marine Pollution (GESAMP) ,  [Pollution Implications of Coastal Area Development - Report and Studies No. 19] ,  Pollution Implications of Coastal Area Development - Report and Studies No. 19

Joint Group of Experts on the Scientific Aspects of Marine Pollution (GESAMP) ,  [Guidelines for the Monitoring and Assessment of Plastic Litter in the Ocean - GESAMP Reports and Studies No. 99] ,  Guidelines for the Monitoring and Assessment of Plastic Litter in the Ocean - GESAMP Reports and Studies No. 99