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United Nations Environment Programme ,  World Meteorological Organization ,  United States Environmental Protection Agency EPA ,  National Oceanic and Atmospheric Administration ,  [Global Atmospheric Background Monitoring for Selected Environmental Parameters: BAPMoN Data Volume I: Atmospheric Aerosol Optical Depth] ,  Global Atmospheric Background Monitoring for Selected Environmental Parameters: BAPMoN Data Volume I: Atmospheric Aerosol Optical Depth

World Meteorological Organization ,  United Nations Environment Programme ,  [Procedures and Methods for Integrated Global Background Monitoring of Environmental Pollution] ,  Procedures and Methods for Integrated Global Background Monitoring of Environmental Pollution

World Meteorological Organization ,  United Nations Environment Programme ,  Intergovernmental Panel on Climate Change ,  [Climate Change 1995: The Science of Climate Change - Summary for Policymakers and Technical Summary of the Working Group I Report] ,  Climate Change 1995: The Science of Climate Change - Summary for Policymakers and Technical Summary of the Working Group I Report