1. NAS. Acid Deposition: Atmospheric Processes in Eastern North America - A Review of Current Scientific Understanding. National Research Council National Academy of Sciences. National Academy Press Washington DC 1983.
2. NAS Medical and Biological Effects of Environmental Pollutants: Nitrogen Oxides. National Academy of Sciences Washington DC 1977.
3. Prepared for Health Effects Research Laboratory, Research Triangle Park;Airborne Particles;NC,1977
4. NAS. Sulfur Oxides. National Academy of Sciences Washington DC 1978.
5. EPA. Air Quality Criteria for Ozone and Other Photochemical Oxidants. EPA-600/8-78-004. Environmental Criteria and Assessment Office Research Triangle Park NC 1978.