Am II References

(54.1): F.S. Tomkins and M. Fred, Spectrochim. Acta, G.B., 1954, 6, 139-43.

(57.1): M. Fred and F.S. Tomkins, J. opt. Soc. Am., 1957, 47, 1076-87.

(71.2): L. Brewer, J. opt. Soc. Am., 1971, 61, 1666-82.

(unp.25): B.V. Pulliam.