1. Al-Morgin, S. (2001). Status of water and wastewater reuse in Saudi Arabia. “Country paper for the joint FAO/WHO Consultation for Launching the Regional Network on Wastewater reuse” Amman, Jordan.
2. Aziz, Q., Inam, A., Samiullah, & Siddiqui, R. H. (1996). Long term effects of irrigation with petrochemical industry wastewater. Journal of Environmental Science and Health, 31(10), 2595–2620.
3. Aziz, Q., Manzar, M., & Inam, A. (1995). Suitability of petrochemical industrial wastewater for irrigation. Journal of Environmental Science and Health, 30(4), 735–751.
4. Bhamidimarri, R., & Shilton, A. (1996). How appropriate are “Appropriate waste management technologies? Defining the future challenge. Water Science Technology, 34, 570–581.
5. Boylan, H. M., Walter, P. J., & Kingston, H. M. (1998). Direct mercury analysis. EPA Method, 7473.