1. Clean air around the world—the law and practice of air pollution control in 14 countries in 5 continents;Barker,1988
2. Field study on carbon monoxide exposure to Kowloon Peninsula area commuters;Chan;POLMET'91,1991
3. Exposure of drivers to carbon monoxide;Colwill;J Air Poll. Contr. Assoc.,1980
4. The estimation of personal exposures to air pollutants for a community-based study of health effects on asthmatics—exposure model;Contant;J Air Pollut. Contr. Assoc.,1987
5. Environment Hong Kong 1992—a review of 1991;EPD (Environmental Protection Department),1992