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3. G. J. Davies, ?Practical Metallic Composites?, (Institution of Metallurgists, London, 1974) p. D1.
4. M. J. Salkind, F. D. Lemkey and F. D. George, ?Whisker Technology?, edited by A. P. Levitt (Wiley, New York, 1967) p. 343.
5. G. A. Chadwick, Acta Met., 24 (1976) 1137.