Carcinogens and Anticarcinogens in the Human Diet. A Comparison of naturally Occurring and Synthetic Substances. Edited by the Commitee on Comparative Toxicity of Naturally Occurring Carcinogens, the Board on Environmental Studies and Toxicology, and the Commission on Life Sciences. XV and 417 pages, numerous figures and tables. National Academy Press, Washington, D. C., 1996. Price: 54.00 US$.