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2. A.M. Filippi, NASA TN D-4955 (1968).
3. J. Heslop,Proc. Journess Int. des Applications du Cobalt (1964), p. 209
4. R.F. Decker and J.W. Freeman,Trans. AIME, 218 (1960), p. 277.
5. C.T. Sims, ASME tech. pub. 70-GT-24 (1970).