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3. D.F. Stein and J.R. Low, Jr.:Trans. TMS-AIME, 1961, vol. 221, pp. 744–46.
4. W. G. Burgers:The Art and Science of Growing Crystals, J. J. Gilman, ed., pp. 416–50, John Wiley and Sons, New York, 1963.
5. D. T. Aust:ibid., pp. 425–78.