REFERENCES
- D. A. Robins, Powder Metallurgy, 1958, (1/2), 172.
- P. Ehrlich, Z. anorg. Chem., 1949, 259, 1.
- R. Kiessling, Acta Chem. Brand., 1950, 4, 224.
- R. Kieffer and F. BenesovslKy, Powder Metallurgy, 1958, (1/2), 150.
- R. Kieffer and F. Benesovsky, ibid., p. 155.