1. R. C. Roberts,Reinf. Plast. Congr. (Brit. Plast. Federation) (1978) 145.
2. BS 4994: 1973 (British Standards Institute, London).
3. M. J. Owen,Reinf. Plast. Congr. (Brit. Plast. Federation) (1976) 167.
4. R. C. Roberts, GRP Vessels and Pipework for the Chemical and Process Industries, Symposium, UMIST, Manchester, 1983 (Mechanical Engineering Publications, London) p. 80.
5. W. S. Carswell andR. C. Roberts,Composites 11 (1980) 95.