1. G. M. Williams and J. H. Weisburger: Prog. Drug Res. 29, 156 (1985).
2. Chemical Manufacturers Association, American Industrial Health Council, American Petroleum Institute, National Agricultural Chemical Association and Pharmaceutical Manufacturers Association : Review and Recommendation for the Revision of the Preamble and Criteria of the IARC Monographs, July 31 (1986).
3. Office of Science and Technology Policy : Chemical Carcinogens: A review of the Science and Its Associated Principles. Fed. Register 50, 10372 (1985).
4. J. Van Ryzin: J. Occup. Med. 22, 321 (1980).
5. R. A. Squire: Science 214, 877 (1981).