To Patty, for her sacrifices, encouragement, and support.
To my students and colleagues for being receptive and critical and for challenging me to be a better teacher

J A H

To Larry, for his love, patience, and support of my determination to manage an administrative position and the writing of this text.

To Fred, who willingly helped me with my challenge by agreeing to revise some of my assigned chapters.

And to Jeff, who inspires and coordinates us so well as we work to keep this text current.

To Evelyn, for her patience, love and support. And to my colleagues and students, from whom I continue to learn so much.