1. Bastian, R.K., 1997. Biosolids management in the United States. Water Environ. Technol., 9(5): 45–50.
2. Bell, P.F., James, B.R., and Chaney, R.L., 1991. Heavy metal extractability in long‐term sewage sludge and metal salt‐amended soils. J. Environ. Qual., 20: 481–486.
3. Berglund, S., Davis, R.D., and L'Hermite, P., eds., 1984. Utilisation of Sewage Sludge on Land: Rates of Application and Long‐Term Effects of Metals. Dordrecht: D. Reidel, 229 pp.
4. Blais, J.F., Tyagi, R.D., Auclair, J.C., and Lavoie, M.C., 1992. Indicator bacteria reduction in sewage sludge by a metal bioleaching process. Water Res., 26: 487–495.
5. Boyd, S.A., and Sommers, L.E., 1990. Humic and fulvic acid fractions from sewage sludges and sludge‐amended soils. In MacCarthy, P., Clapp, C.E., Malcolm, R.L., and Bloom, P.R., eds., Humic Substances in Soil and Crop Sciences: Selected Readings. Madison, WI: American Society of Agronomy and Soil Science Society of America, pp. 203–220.