1. R. S. Burd, “A Study of Sludge Handling and Disposal”, US Dept. of the Interior, Federal Water Pollution Control Administration, Publ. WP-20-4 (1968).
2. S. Kelman and C. P. Priesing, “Polyelectrolyte Flocculation-Sand Bed Dewatering,” paper presented at the Michigan WPCA Conf., June, 1964.
3. “Recommended Standards for Sewage Works”, a Report of the Committee of the Great Lakes-Upper Mississippi River Board of State Sanitary Engineers, Health Education Service, Albany, NY, 1968.
4. “Process Design Manual for Sewage Treatment and Disposal”, US EPA Technology Transfer, EPA 625/1-74-006, October, 1974, Ch. 7.
5. Water Pollution Control Federation, “MOP 8. Wastewater Treatment Plant Design,” WPCA (1977).