1. J. B. Edwards, E. E. Hucke, and J. J. Martin:Met. Rev., 1968, vol. 13, p. 1.
2. B. W. Clack:Proc. Phys. Soc. London, 1924, vol. 36, p. 313.
3. F. Y. Lieu: Unpublished M.S. thesis., Library Iowa State University, Ames, Iowa, 1965.
4. J. D. Verhoeven and E. E. Hucke:Trans. Met. Soc. AIME, 1963, vol. 227, p. 1156.
5. O. Kubaschewski and J. A. Catterall:Thermochemical Data of Alloys, Pergamon Press, Inc., New York, 1956.