“Corrosion.” Britannica Student Encyclopedia. 2003. Encyclopedia Britannica Premium Service. 12 Nov, 2003 http://www.britannica.com/ebi/article?EU=295655.
“Corrosion.” Microsoft Encarta Online Encyclopedia 2003. http//encarta.msn.com 1997-2003 Microsoft Corporation.
“What is Corrosion?” http://www.windsun.com/CP_Stuff/Corrosion_Bas.htm