1. Vapour Deposition;Powell,1966
2. British Patent 1,326,769 (1973), to R. H. Lewin and C. Hayman.
3. British Patent Application 11,818 (1975), to N. J. Archer and C. Hayman.
4. Proc. 5th Int. Conf. on Chemical Vapour Deposition;Mantle,1975
5. U. S. Patent 3,721,577 (1973), to P. F. Woerner.