1. Population Censuses and Surveys. Deaths in England and WRales 1979;Office of,1984
2. Survival in peptic ulcer;0, Bonnevie;Gastroenterologv,1978
3. Natural history of duodenal ulcer. Gastroenterologe 1983; 85;Hirschowitz, B.I.
4. Effects of different operation policies on mortality from bleeding peptic ulcer;Dronfield, M.W.; Atkinson, M.; Langman, M.J.S.;Lancet,1979
5. Mortality in patients with haematemesis and melaena: a prospective study;Hunt, P.S.; Hansky, J.; Korman, M.G.;Br Med],1979