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3. Fatal asthma;Anonymous;Lancet,1979
4. The circumstances preceding death from asthma in young people in 1968 to 1%9;Fraser, P.M.; Speizer, F.E.L.; Waters, S.D.M.; Doll, R.; Mann, N.M.;BrJ Dis Chest,1971
5. Asthma deaths in Cardiff 1%3-74: 53 deaths in hospital;MacDonald, J.B.; MacDonald, E.T.; Seaton, A.; Williams, D.A.;BrMedJ,1976