1. OMAF/OME, 1992, Guidelines for sewage sludge utilization on agricultural lands, Sludge and Waste Utilization Committee, Ontario
2. Saskatchewan Environment, 1987, Saskatchewan’s guidelines for the use of sewage sludge on agricultural lands, Regina, Saskatchewan, Canada
3. Spankie, J. A. Harrison, J. T. Waite, D. T. 1992, A demonstration near Regina, Saskatchewan of the application of treated municipal sludge to agricultural land
4. USEPA, 1983, Process design manual on land application of municipal sludge, Center for Environmental Research Information, Cincinnati, Ohio
5. Feasibility analysis of agricultural use of wastewater sludge—a case study;Viraraghavan,1987