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This edition © 2008 ANU E Press
Theses at The Australian National University are assessed by external examiners and students are expected to take into account the advice of their examiners before they submit to the University Library the final versions of their theses. For this series, this final version of the thesis has been used as the basis for publication, taking into account other changes that the author may have decided to undertake. In some cases, a few minor editorial revisions have made to the work. The acknowledgements in each of these publications provide information on the supervisors of the thesis and those who contributed to its development. For many of the authors in this series, English is a second language and their texts reflect an appropriate fluency.