1. California State Water Resources Control Board. “Health Aspects of Wastewater Reclamation for Groundwater Recharge.” Sacramento, CA: 1976.
2. “Wastewater Treatment and Reuse by Land Application, Vol I—Summary.”;Pound,1973
3. “Process Design Manual Land Treatment of Municipal Wastewater,” U.S. Environmental Protection Agency, U.S. Army Corps of Engineers, U.S. Department of Interior, U.S. Department of Agriculture, EPA 625/1-81-013 (October 1981).
4. “An Approach to the Identification of Organic Compounds Hazardous to the Environment and Human Health.”;Stephenson;Ecotoxicology and Environmental Safety,1977
5. “National Interim Primary Drinking Water Regulations.” U.S. Environmental Protection Agency, EPA 570/9-76-003 (1976).