1. American Council on Science and Health., 1983 . Cancer in the United States: Is There an Epidemic ? New York. March, p.27 .
2. American Council on Science and Health., 1984 . Ethylene Dibromide.
3. Michael A., P.G. Apgar, 1988 . Applying technology and science in regulatory programs-is a pound of prevention more desirable than the ounce of cure? Briefings. Fall.
4. Ron. Arnold, 1982 . At the Eye of the Storm . James Watt and the Environmentalists, Regnery Gateway, Chicago, IL. p.210 .