1. Barraclough, B. M., Nelson, B., Bunch, J., Sainsbury, P.: The diagnostic classification and psychiatric treatment of 100 suicides. Proceedings of the Fifth International Conference for Suicide Prevention, London 1969.
2. Birtchnell, J.: Recent parent death and mental illness. Brit. J. Psychiat.116, 289?297 (1970).
3. Chester Beatty Research Institute (1970). Serial abridged life tables, Tables 62 B and 86 B.
4. Clayton, P.: A study of normal bereavement. Paper read to the annual conference of the Amer. Psych. Ass., Detroit 1967.
5. Howe, G. M. (ed.): National Atlas of Disease Mortality in the United Kingdom, Nelson, 1968.