The 1985 Directory contains 1,230 projects in the field of cancer epidemiology carried out in 80 countries. It provides epidemiologists and others with information about on-going work, facilities contacts between researchers, and helps researchers avoid unnecessary duplication of work. This year the Directory also contains projects in the field of mutation epidemiology as well as numerous lists, including lists of biological material banks and their holdings, names and addresses of investigators, and population-based cancer registries.