1. National Research Council. Acid Deposition Long Term Trends; Committee on Monitoring and Assessment of Trends in Acid Deposition; Gibson, J.H., chairman; National Academy Press: Washington, DC, 1986.
2. National Acid Precipitation Assessment Program. Atmospheric Processes Research and Process Model Development, Report 2. In Acid Deposition: State of Science and Technology; Irving, P.M., Ed.; Office of the Director: Washington, DC, 1990; Vol. 1: Emissions, Atmospheric Processes, and Deposition.
3. National Acid Precipitation Assessment Program. Regional Acid Deposition Modeling, Report 3. In Acid Deposition: State of Science and Technology; Irving, P.M., Ed.; Office of the Director: Washington, DC, 1990; Vol. 1: Emissions, Atmospheric Processes, and Deposition.
4. National Acid Precipitation Assessment Program. The Regional Acidic Deposition Model and Engineering Model, Report 4. In Acid Deposition: State of Science and Technology; Irving, P.M., Ed.; Office of the Director: Washington, DC, 1990; Vol. 1: Emissions, Atmospheric Processes, and Deposition.
5. National Acid Precipitation Assessment Program. 1990 Integrated Assessment Report; Office of the Director: Washington, DC, 1990; p 190.