1. Sulphur dioxide;Barrett,1970
2. Volcanic Hazards: a source book on the effects of eruptions;Blong,1984
3. Effects on fish;Brown,1988
4. Absorption of sulphur dioxide by pine needles leading to acute injury;Caput;Environ. Pollut.,1978
5. Selection of plants resistant, absorptive and sensitive to air pollutants;Chia-hsi,1982