1. U.S. International Trade Commission, “Synthetic Organic Chemicals, United States Production and Sales of Surface-Active Agents,” 1979.
2. Arthur D. Little, Inc., “Human Safety and Environmental Aspects of Major Surfactants,” National Technical Information Service, Document PB 301 193/9ST, Springfield, Virginia, 1977; and references cited therein.
3. R.D. Swisher, “Surfactant Biodegradation,” Marcel Dekker, Inc., New York, 1970; and references cited therein.
4. Organization for Economic Cooperation and Development, “The Pollution of Water by Detergents,” Paris, 1964.
5. American Public Health Association, “Standard Method for the Examination of Water and Wastewater,” New York, 1960.