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United Nations Environment Programme ,  World Meteorological Organization ,  World Climate Data and Monitoring Programme ,  [The Global Climate System: Climate System Monitoring December 1988-May 1991] ,  The Global Climate System: Climate System Monitoring December 1988-May 1991

Food and Agriculture Organization of the United Nations ,  International Council for Science ,  United Nations Environment Programme ,  United Nations Educational, Scientific and Cultural Organization ,  World Meteorological Organization ,  [The Global Terrestrial Observing System and the Convention to Combat Desertification] ,  The Global Terrestrial Observing System and the Convention to Combat Desertification