Kay Lindgren, NEC. 



Helen Ingram, University of Arizona, Tucson, AZ, 



I'm also grateful to Ms. Jennifer Shoemaker, who was responsible for the 

 graphics; Mr. Jim Zuboy, who edited the manuscript several times; and our 

 wonderfully patient and experienced typists, Ms. Connie Spelling, Ms. Marlys 

 Updike, Ms. Elizabeth Barstow, Ms. Dora Ibarra, and Ms. Patricia Gillis. And 

 finally, I would like to express my thanks to my daughter, Victoria, and my 

 friends and coworkers for providing the friendship and emotional support this 

 writer could not have done without during the time it took to complete this 

 report. 



VI 



