1. DIVERSITY 14: 27 (1988).
2. FEDERAL REGISTER 53 (1988).
3. Food and Chemical News: 10 (6 2 1989).
4. Introduction of Recombinant DNA-Engineered Organisms into the Environment: Key Issues (1987).
5. New Developments in Biotechnology: Field Testing Engineered Organisms: Genetic and Ecological Issues (1988).