1. Lumsden, J., Thermodynamics of Alloys, 250 (Inst. Metals Mon., No. 11, London, 1952).
2. Baker, E. H., J. Chem. Soc., 464 (1962); 699 (1964).
3. Allen, N. P., J. Inst. Met., 49, 317 (1932).
4. Kelley, K. K., Contributions to the Data on Theoretical Metallurgy, Bull., 584, 164 (U. S. Bureau of Mines, Washington, D.C., 1960).
5. Sieverts, A., and Hagenacker, J., Z. physical. Chem., 68, 115 (1909).