1. Chemical Analysis of Ecological Materials;Allen,1974
2. Improved thermal sludge conditioning by treatment with acids and bases;Alsop;J. Water Poll. Contr. Fed.,1982
3. Standard Methods for the Examination of Water and Wastewater;American Public Health Association,1976
4. A simple automatic instrument for determining the filtrability of sewage sludge;Baskerville;Water Pollut Control,1968
5. Sulfur dioxide hydrolysis converts sludge to animal feed cut plant cost;Bouthilet;Ind Res,1970