1. R. H. Herber, in Mössbauer Effect Methodology, I. Gruverman, ed. (Plenum Press, New York, 1965), Vol. 1, p. 3.
2. J. J. Spijkerman, F. C. Ruegg, and J. R. DeVoe, in Mössbauer Effect Methodology, I. Gruverman, ed. (Plenum Press, New York, 1965), Vol. 1, p. 115.
3. J. J. Spijkerman, D. K. Snediker, F. C. Ruegg, and J. R. DeVoe, NBS Misc. Pub. 260–13, 28 July 1967.
4. R. W. Grant, R. M. Housley, and U. Gonser, Phys. Rev.
178:523 (1969).
5. R. H. Herber and Y. Hazony, in Physical Methods of Chemistry, A. Weissberger and A. Rossitter, eds. (Interscience, New York, 1970).