Zhao, Zixian2009-07-152009-07-151993http://hdl.handle.net/10125/9442Thesis (Ph. D.)--University of Hawaii at Manoa, 1993.Microfiche.xiv, 235 leaves, bound 29 cmen-USAll UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner.Thesis