1. Nickel, Cadmium, and Lead;Amacher,1996
2. Basta , N.T. Storm , D.E 1997 Use of Alum Residuals to Reduce Nutrient Runoff From Agricultural Land Treated With Animal Manure to Protect Surface Water Quality Proc. 1997 Water Residuals and Biosolids Management: Approaching the Year 2000. WEF/AWWA Joint Specialty Conf., Philadelphia.