1. J. M. A. LENIHAN, S. J. THOMSON (Eds), Activation Analysis, Principles and Applications, Academic Press, London, 1965.
2. J. M. A. LENIHAN, Activation Analysis, Vol. 3, Western Regional Hospital Board, Glasgow, 1969.
3. Report U. S. Department of Health, Education and Welfare, Public Health Service Publication Washington, 1103/1964.
4. T. C. TSO, Bot, Bull. Acad. Sinica, 7 (1966) 28.
5. R. A. NADKARNI, W. D. EHMAN, Radiochem. Radioanal. Letters 2 (1969) 161.