US/FRG Research Symposium: Effects of Atmospheric Pollutants on the Spruce-Fir Forests of the Eastern United States and the Federal Republic of Germany (1987 : Burlington, Vt.)
United States Environmental Protection Agency/Oak Ridge National Laboratory Workshop on Risk Assessment for Municipal Waste Combustion: Deposition, Food Chain Impacts, Uncertainty, and Research Needs (1989 : Cincinnati, Ohio)