1. Sludge Management: Capital Improvements.;Kruger;Water Eng. Manage.,1991
2. A ‘Backward’ Approach to Sludge Management.;Halley;Water Eng. Manage.,1991
3. Putting Sludge to Work.;Hasbach;Pollut. Eng.,1991
4. Sludge Management Practices in the U. S.;Goldstein;BioCycle,1991
5. Managing Sludge and MSW in Memphis.;Riggle;BioCycle,1991