The suggestion that cancer incidence rates for different parts of the world should be brought together in single volume arose in diSCUssion among mem- bers of the Geographical Pathology Committee of the International Union Against Cancer during a symposium in Mexico in .1964. That there was a need for such a volume rapidly became apparent when the directors of cancer registries were asked for their opinion. Of those approached, all but one responded enthusias- tically and immediately agreed to contribute. In the event, data have been col- lected from 32 cancer registries in 24 countries, and...