1. Characterization and Conditioning of Water Treatment Plant Sludge;Gates;Jour. AWWA,1968
2. Waste Alum Sludge Treatment;Neubauer;Jour. AWWA,1958
3. Sludge Conditioning by Freezing;Doe;Water and Sewage Works,1965
4. Treatment and Disposal of Alum Sludge;Palin;Proc. Soc. of Water Treat. and Exam.,1954