1. Environmental Protection Department, 1996a. Environmental Hong Kong 1996. Hong Kong
2. Environmental Protection Department, 1996b. Air quality in Hong Kong. Hong Kong
3. Government Secretariat, 1993. Hong Kong environment, the Hong Kong environment: a green challenge for the community, second review of the 1989 white paper, pollution in Hong Kong – time to act, planning, environment and lands branch
4. Determination of atmospheric lead in Suwon city;Lee;Journal of the Korean Environmental Sciences Society,1995
5. Ringler, E.S., et al., 1992. The summer 1992 PM-10 saturation monitoring study in the Ashland, KY area. Southern Research Institute