1. Bouwer H. and R.C. Rice. 1978. Land treatment of municipal wastewater-state of the art. Paper presented at the American Society of Civil Engineering, Environmental Engineering Specialty Conference, July 10-12, 1978, Kansas City, MO.
2. Safeguards for ground water;Josephson;Environ. Sci. Technol.,1980
3. Trace organics in ground water;McCarty;Environ. Sci. Technol.,1981
4. U.S. Environmental Protection Agency. 1977. Process design manual for land treatment of municipal wastewater. Washington, DC, EPA 625/ 1-77-008.