1. Social science in a water observing system
2. Water Sustainability in a Changing World
http://www.nwri-usa.org/pdfs/2010ClarkePrizeLecture.pdf
3. Four Scenarios for US Population Growth;Mather,2009
4. http://www.un.org/esa/population/publications/ longrange2/WorldPop2300final.pdf
5. Climate Change 2007: Impacts, Adaptation and Vulnerability,2007