1. The Wall Street Journal, March 25, 1993, p. A7.
2. The Wall Street Journal, May 11, 1993, p. B9.
3. Dow Chemical Corporation (letter to customers), October 1991.
4. ;. Nemours (letter to customers), January 15, 1993.
5. Dow Corning Corporation (letter to customers), December 4, 1992.