Sewage sludge: Sewage Sludge: Land Utilization and the Environment. C.E. Clapp,W.E. Larson and R.H. Dowdy (Editors). Proceedings of the Third National Land Utilization of Sludge Conference,Bloomington, MN, 11–13 August 1993. Soil Science Society of America,Madison, WI, 1994. ISBN 0-89118-813-4, 258 pp., paperback,US$ 30 |