1. Sulfur dioxide;Barrett,1970
2. Reduction of ozone damage to Petunia hybrida Vilm, by use of growth regulating chemicals and tolerant cultivars;Cathey;J. Am. Soc. Hortic. Sci.,1972
3. The effect of peroxyacetyl nitrate on petunia (Petunia hybrida Vilm.);Drummond,1972
4. Response of bean and tobacco to ozone: effect of light intensity, temperature and relative humidity;Dunning;J. Air Pollut. Control Assoc.,1977
5. Cumulative effects of chronic exposure of plants to low levels of air pollutants;Feder,1973