1. G. F. Box and A. Walsh, Spectrochim. Acta 16:255 (1960).
2. W. T. Elwell and J. Gidley, Anal. Chim. Acta 24:71 (1961).
3. C. Feldman and R. K. Dhumwad, Sixth Conference on Analytical Chemistry in Nuclear Reactor Technology Gatlinburg, Tennessee, October, 1963.
4. K. Fuwa, and B. L. Vallee, International Conference of Spectroscopy, College Park, Maryland, June, 1962.
5. B. M. Gatehouse and J. B. Willis, Spectrochim. Acta 17: 710 (1961).