This book has benefited from advice, support and assistance of many individuals, too many to acknowledge here. However, special mention is due to: Dr John R. Lupien, Director of the FAO Food and Nutrition Division, who encouraged me to write this book and who has been enormously supportive from start to finish, and whose staff has also provided invaluable advice; Dr M. Anwar Hussain of FAO, who spent long hours reviewing various drafts of the book and improving the text; Doreen Doty, who for some 20 years served as my Administrative Assistant, and who expertly did most of the word processing for the first and subsequent drafts of this publication; Rozanne Chorlton of Scotland, United Kingdom, who edited over half the chapters; Elisabeth Linusson, who assisted both with the selection of illustrations and with the bibliography; Valerie Stetson and other Cornell graduate students who assisted with the revision and rewriting of specific chapters; Viera Larsson, who provided drawings; Dr Carolyn Campbell, who gave final editing assistance; and Dr Lani Stephenson, who over many years has provided invaluable advice and support. The publication was edited in FAO by Andrea Perlis.
