1. Ali I. “Development of Groundwater Resources of Saudi Arabia ” Proceedings of Institution of Civil Engineers London U.K. Paper No. 8662 Nov. 1983.
2. Ali I. “Agricultural Re‐use of Wastewater ” Short Course Lecture UPM Dhahran Saudi Arabia Apr. 1984.
3. Ali I. Ahmed M. Appa A. et al. “Use of Secondary Treated Effluent for Irrigation: Yield and Environmental Aspects ” 2nd Saudi Engineers' Conference held at Dhahran Saudi Arabia 1985.
4. “Biological Standards for Effluent Reuse in Arizona ” Technical Report Arizona Dept. of Health Services Bureau of Water Quality Control Phoenix Ariz. 1980.
5. California Administrative Code Ch. 4 Title 22 Div. 4 Environmental Health 1974.