Welch, Barry John2023-07-282023-07-281978https://hdl.handle.net/2292/65096Full text is available to authenticated members of The University of Auckland only.Items in ResearchSpace are protected by copyright, with all rights reserved, unless otherwise indicated.Restricted Item. Full text is available to authenticated members of The University of Auckland only.https://researchspace.auckland.ac.nz/docs/uoa-docs/rights.htmThesisCopyright: The author