REFERENCES
- E. Therkelsen, Metals and Alloys, 1933, 4, 105; Met. Ind. (Lund.), 1933,43, 175.
- R. W. Yancey and W. H. Lenz, "Metals Handbook", p. 590. 1948: Cleveland, O. (Amer. Soc. Metals).
- O. Kubaschewski and H. Speidel, J. Inst. Metals, 1948-49, 75, 417.
- R. W. K. Honeycombe, Proc. Austral. Inst. Min. Met. , 1942, (128). 227.
- R. Edwards and T. Raine, Plansee Proc., 1952, 232.