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United Nations Environment Programme ,  [Addressing the Used Vehicles Market: Potential Strategies for Importing and Exporting Countries to Improve Safety, Fuel Economy and Emissions Impacts - A Report of the Used Vehicles Working Group of the Partnership for Clean Fuels and Vehicles (PCFV)] ,  Addressing the Used Vehicles Market: Potential Strategies for Importing and Exporting Countries to Improve Safety, Fuel Economy and Emissions Impacts - A Report of the Used Vehicles Working Group of the Partnership for Clean Fuels and Vehicles (PCFV)

United Nations Environment Programme ,  [Natural Selection: Evolving Choices for Alternative Fuels and Vehicle Technologies] ,  Natural Selection: Evolving Choices for Alternative Fuels and Vehicle Technologies