The Directory of On-going Research in Cancer Epidemiology is an annual compendium of current research in cancer epidemiology. The 1992 edition (16th in the series) contains abstracts of 1250 projects being carried out in over 80 countries, and reflects the huge range of epidemiological research into the distribution, causes and preventions of cancer around the world. Each project is indexed in up to eight separate indexes, enabling rapid searches for current studies fitting almost any description. In addition, with the help of an IBM-compatible diskette, it is possible to search the indexes simultaneously, using specially-developed software, making searches more expedient and efficient. The eight indexes are: name of investigator(s); keywords; cancer site(s); study type (cohort, case-control, etc.); country; chemical exposure; occupational exposure; cancer registry. The Directory also includes comprehensive lists of 261 population-based cancer registries and over 300 biological material banks, all available for collaboration in epidemiological research. The addresses of nearly 1000 principle investigators are provided to improve contact between research workers.