1. British Thoracic Association. Death from asthma in two regions of England: a confidential inquiry;Br Med J,1982
2. Report of the Committee on Death Certification and Coroners (Brodrick Committee). Report of the committee,1971
3. Medical aspects ofdeath certification;of Physicians, Royal College; of Pathologists, Royal College;J R Coll Physn Lond,1982
4. Manual of the international statistical classification of diseases, injuries and causes of death: based on the recommendations of the ninth revision conference;World Health Organisation,1975
5. A century of asthma deaths in young people;Speizer, F.E.; Doll, R.;Br Med J,1968