1. Lyman, T., A.S.M. Metals Handbook (1961)
2. Rare Metals Handbook;Hampel,1961
3. Krikorian, O. H., Thermal Expansion of High Temperature Materials, VCRL 6 132, Sept. (1960)*
4. Physical and Chemical Measurements at High Temperatures;Bockris,1959
5. MacDonald, R. N. and Boucon, H. H., Nucleonics, 20, August 8th, 158 (1962)*