1. Gordon, R. L., The hobgoblin of coal: policy and regulatory uncertainties, Science, 200, 153, 1978.
2. Adriano, D. C., Page, A. L., Elseewi, A. A., Chang, A. C., and Straughan, l., Utilization and disposal of fly ash and other coal residues in terrestrial ecosystem. A review, J Environ.
Qual., 9, 333, 1980.
3. Murarka, J. R, Inorganic and organic constituents in fossil fuel combustion residues, Vol. I. Research Project 2485–8, Electric Power Research Institute, Columbus, Oh., 1987, 157.
4. National Ash Association, Ash at work, Nat. Ash Assoc., Washington, DC, X(4), 1978, 1.
5. Bilski J. J., Alva, A. K., and Sajwan, K. S., Fly Ash, in Soil Amendments and Environmental Quality, Rechcigl, J. E., Ed., CRC Press, Inc., Boca Raton, Fla., 1995, chap. 9.