From Organic Design

Yo Sven, could you add that Human Ecology usury description into the article? I've lent my copy to Milan --Nad 11:12, 15 April 2008 (NZST)

Yeah, I took ages to find it, but I think it is either p84, or 184 (will check at home). Basically the difference is in the synonym versus excessive interest. I have put a post about it at W:Talk:Usury#Formal_definition --Sven