1. B. N. Taylor, W. H. Parker and D. N. Langenberg, Rev. Mod. Phys. 41, 375 (1969).
2. B. N. Taylor and E. Richard Cohen, Proceedings of the Fifth International Conference on Atomic Masses and Fundamental Constants (AMC0–5), Paris, June 2–6, 1975.
3. For a general review of the conventional techniques see R. T. Robiscoe in Cargese Lectures in Physics, edited by M. Levy (Gordon and Breach, New York, 1968), Vol. 2, p. 3.
4. S. Triebwasser, E. S. Dayhoff and W. E. Lamb, Jr., Phys. Rev. 89, 98 (1953).
5. R. T. Robiscoe and T. W. Shyn, Phys. Rev. Lett. 24, 559 (1970).