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2. T. Z. Kattamis andM. C. Flemings,Tram. Met. Soc. AIME 236 (1966) 1523.
3. Idem, Modern Castings 52 (1967) 97.
4. G. L. F. Powell,J. Australian Inst. Metals 10 (1965) 223.
5. J. L. Walker, cited byB. Chalmers in ?Principles of Solidification? (Wiley, NY, 1964) p. 122.