1. Adriano, D.C., A.L. Page, A.A. Elseewi, and A.C. Chang. 1982. J Environ Qual 11: 197 - 203.
2. Ainsworth, C.C., and D. Rai. 1987. Chemical Characterization of Fossil Fuel Combustion Wastes. EPRI Rep EA-5321. Electric Power Res Inst, Palo Alto, CA.
3. Allen, H.E., R.H. Hall, and T.D. Brisbin. 1980. Environ Sci Technol 14: 441 - 443.
4. Andersson, A. 1977. Swedish J Agric Res 7: 7 - 20.
5. Andersson, A., and K.O. Nilsson. 1972. Ambio 1: 176 - 179.