1. J. Soil Sci. 1973, 24, (in press).
2. Principles of Geochemistry Wiley, New York. 1966, p. 221.
3. Geochemistry Clarendon Press, Oxford. 1958, p. 612.
4. ON THE SOIL CHEMISTRY OF RADIO-IODINE
5. Soil and Plant Analysis University of Adelaide, Adelaide. 1950, p. 77.