Notae[recensere | fontem recensere]
- World Resources Institute: August 2008 Monthly Update: Air Pollution's Causes, Consequences and Solutions Submitted by Matt Kallman on Wed, 2008-08-20 18:22. Retrieved on April 17, 2009
- waterhealthconnection.org Overview of Waterborne Disease Trends By Patricia L. Meinhardt, MD, MPH, MA, Author. Retrieved on April 16, 2009
- Pennsylvania State University > Potential Health Effects of Pesticides. by Eric S. Lorenz. 2007.