Add to ORKGI would like to express my appreciation and gratitude to the members of my committee, Drs. W. F. Landers, C. G. Halcomb, D. Chatfield, and J. Bodden, for their guidance, encouragement, and friendship throughout my graduate train-ing. I am also deeply indebted to Dr. B. J. Locke for his help, advice, and tolerance, not only during this project, but also during the years that I was his graduate advisee. Special thanks is extended to Mr. Gary Byrd for his un-selfish assistance throughout all phases of this research and to Mrs. Beverly Sawyer for her eager help. I would particularly like to thank my wife Carole for her patience, support, and long hours of help, without which this project could not have been completed. Finally, my deepest apprec...