1. E. A. D. White andJ. D. C. Wood, to be published.
2. D. W. G. Ballantyne andF. H. Lou, to be published.
3. K. C. Radford andC. W. A. Newey,Proc. Brit. Ceram. Soc. 9 (1967) 131.
4. H. J. M. Bowen andD. Gibbons, ?Radioactivation Analysis? (Clarendon Press, Oxford, 1963).
5. W. S. Lyon, ?Guide to Activation Analysis? (Van Nostrand, New York, 1964).