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Acknowledgment “I have not attempted to cite in the text all the authorities and sources consulted in the preparation of this work. To do so would require more spaces than is available. The list would include departments, libraries, industrial institutions, periodical, and many individuals.” However, my gratitude goes to Kampala International University, Ahmadu Bello University, and staff and management of the University of Johannes- burg for the research experience. I am thankful to my family and all well-meaning friends and well-wishers who continue to support me. xv Acknowledgment