Acknowledgements

It would be impossible to acknowledge here by name all the teachers,
colleagues, and students who contributed to the development and
improvement of this book over its previous fifteen editions. Hundreds of
users have written to us with specific suggestions, and much of the credit
for the improvement of the book over the years belongs to them. We can
no longer list them individually but we thank them all sincerely.

For the development of this sixteenth edition, we are grateful to the many
people who offered informal suggestions. We would also like to thank the
following instructors who provided us with formal reviews of the
textbook. Their observations and recommendations were extremely
helpful.

Medoune Seck, CEGEP John Abbott College

Paul T. Dickinson, McGill University

Mark Raymond, Saint Mary’s University

Cheryl Jenkins, John Abbott College

Kevin Richter, Douglas College

Fulton Tom, Langara College

Mayssun El-Attar Vilalta, McGill University

Michael Barber, Queen’s University

Michael Batu, University of Windsor

Catherine Boulatoff, Dalhousie University