1. Abberton, E. and Fourcin, A.J. (1972) Laryngographic analysis and intonation. Br. J. Disord. Commun., 7 (1), 24–30.
2. Berry, R.J., Epstein, R., Fourcin, A.J. et al. (1982) An objective analysis ot voice disorder: Part 1 and 2. Br. J. Disord. Commun., 17 (1), 67–76, 84–90.
3. Donnelly, P. and Kellow, B. (1989) An experience in setting up a joint voice clinic. Voice Res. Soc. Newsletter, March, 18–21.
4. Harris, T. M., Collins, S. R. C. and Clarke, D. D. (1986) The Oxford voice clinic: Preliminary research results, in Harris, T. M., Collins, S. R. C. and Clarke, D.D. (ed.) Developments in Voice Conservation. Bruel and Kjaer, London.
5. Julian, W., MacCurtain, F. and Noscoe, N. (1981) Anatomical factors influencing voice quality. J. Physiol., 315 (3), 10–11.