Christopher M. Godfrey (November 4, 2008). "Greenhouse effect and climate"(PDF). Atmospheric Sciences. University of North Carolina, Asheville. Archived from the original(PDF) on 19 July 2011.
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Christopher M. Godfrey (November 4, 2008). "Greenhouse effect and climate"(PDF). Atmospheric Sciences. University of North Carolina, Asheville. Archived from the original(PDF) on 19 July 2011.