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I have changed the reference formats. Reference '9' did not appear in the text so I have left it as the last reference in the list as I am not sure what it refers to as it is not a paper I have studied. I do not have the ISBN for the text books, which need adding. I apologise for not leaving a clean history trail put it down to fatigue.Axiosaurus 16:40, 23 July 2007 (UTC)