AERC Paper 2012

http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=3&ved=0CFMQFjAC&url=http%3A%2F%2Fwww.adulterc.org%2FProceedings%2F2012%2Fpapers%2Fcampbell2.pdf&ei=UG5FUbymI-3l4APs64CYCQ&usg=AFQjCNFNCFoJi96WLRzyseBuIgpdNntzWw&sig2=pBY2Z5GDe3ah7OGu3WuTbQ&bvm=bv.43828540,d.dmg