2383350document54764RIEWPAKORN Poramaporn-thesis_nosignature.pdfapplication/pdfb73d56c1606e5c6af97c4f61d65e0ac2MD511729582020-07-13 01:57:36https://vuir.vu.edu.au/1991/3/RIEWPAKORN%20Poramaporn-thesis_nosignature.pdf