I have made extreme efforts to contact F M Liang (including leaving messages on what I hoped was his answering machine, but I may have called the wrong F M Liang - no call back ensued) to ask for copyright clearance to post part of his thesis here. He appears to have dropped off the networking map. Should he ever surfce I would appreciate if he would contact me (gtoal@gtoal.com) either to ask me to take this down or preferably to give me permission to leave it online. It is impossible to get this paper through inter-library loan from his old university, who appear to have some sort of cozy deal going on with a commercial reprint company who charge excessively for access to this thesis.