1. Abu-Hilal, A., M. Badran, and J. de Vaugelas. 1988. Distribution of trace elements in Callichirus laurae burrows and nearby sediments in the Gulf of Aqaba, Jordan (Red Sea). Marine Environmental Research 25:233–248.
2. Abuzkhar, A.A., A.S. Gibali, Y.I. Elmehrik, and R. Ahmatullah. 1987. Chemical monitoring of sewage wastes for their use in crop production. I. Solid sludge as a soil amendment. Environmental Monitoring and Assessment 8:127–133.
3. Ajmal, M., and R. Uddin. 1986. Studies on heavy metals in the ground waters of the City of Aligarh U.P. (India). Environmental Monitoring and Assessment 6:181–194.
4. American Water Works Association. 1985. An AWWA survey of inorganic contaminants in water supplies. Journal of the American Water Works Association 77:67–72.
5. Anestis, I., and R.J. Neufeld. 1986. Avoidance-preference reactions of rainbow trout (Salmo gairdneri) after prolonged exposure to chromium (VI). Water Research 20:1233–1241.