The Directory of On-going Research in Cancer Epidemiology compiles information of current research projects in the field. The twelfth title in the series, this 1987 edition contains 1323 projects carried out in over 80 countries. The 1987 issue presents studies of the most common cancer sites (lung, female breast, cervix, and gastrointestinal tract); studies of occupational exposure; the possible role of virus in the etiology of cancer; and projects in mutation epidemiology. Also included is a list of biological material banks, lists of population-based cancer registries, and indexes to information on investigators, general terms, cancer sites, chemicals, occupations, types of studies and countries where data are being collected.