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3. W. Watt, L. N. Phillips, J. Johnson.Engineer, London 221 (1966) 815.
4. J. Aveston, R. A. Mercer andJ. M. Sillwood, Fibre Reinforced Cements ? Scientific Foundations for Specifications. Composites ? Standards, Testing and Design. NPL Conference 8?9 April (1974).
5. A. Briggs, D. H. Bowen andJ. Kollek, "International Conference on Carbon Fibres, Their Place in Modern Technology", London, February (Unwin, Old Woking, 1974). Paper No. 17.