1. Adams, S.N., J.L. Honeysett, K.G. Tiller, and K. Norrish. 1969. Aust J Soil Res 7: 29–42.
2. Adriano, D.C., and H.E. Doner. 1982. In A.L. Page et al., eds. Methods of Soil Analysis, part 2. Am Soc Agron, Madison, WI.
3. Adriano, D.C., M. Delaney, and D. Paine. 1977. Commun Soil Sci Plant Anal 8: 615–628.
4. Alban, L.A., and J. Kubota. 1960. Soil Sci Soc Am Proc 24: 183–185.
5. Allen, R.O., and E. Steinnes. 1979. In Proc Intl Conf Heavy Metals in the Environment. CEP Consultants, Edinburgh.