1. COHEN, E.R., and TAYLOR, B.N., J. Phys. Chem. Ref. Data 2, 663 (1973). We shall refer to this paper as CT73.
2. CODATA Bulletin No. 11 (December 1973).
3. TERRIEN, J., Metrologia 10, 9 (1974).
4. BLANEY, T.G., et al., Nature 251, 46 (1974).
5. LECLERC, G., Report on the 13th Comparison of the National Standards of Electromotive Force, Bureau International des Poids et Mesures, Sèvres, France (1974); LECLERC, G., Report on the 13th Comparison of the National Standards of Electric Resistance, BIPM, Sèvres, France (1974); see also GALLOP, J.C., and PETLEY, B.W., IEEE Trans. Instrum. Meas. IM-23, 267 (1974); KOSE, V., et al., ibid, p. 271.