Hasholt, B. Use of Soil for Treatment and Final Disposal of Effluents and Sludge: Proceedings of an LAWPRC International Seminar Held in Salvador, Bahia, Brazil, 13-15 August 1986. Paulo R.C. Oliveira, Sergio A.S. Almeida (eds.). (Water Science and Technology, Vol. 19 (1987) No. 8.). gt 1989, 89.