4627document3233Decl_IS_Higgens_MPhil_11.pdfapplication/pdf20553ab5717ee078c57187337d8e6a7eMD54040722011-07-19 16:32:47http://etheses.bham.ac.uk//id/eprint/1298/1/Decl_IS_Higgens_MPhil_11.pdf