1. Associated Press 2008 Big US Water Agencies Form Group to Tackle Climate Change Mercury News http://origin.mercurynews.com/breakingnews/ci_8369072
2. Bauer , J. 2007 Conducting a Greenhouse Gas Emission Inventory Power Engrg. http://pepei.pennnet.com/display_article/313217/6/ARTCL/none/none/1/Conducting-a-Greenhouse-Gas-Emission-Inventory/