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2. Trends of mortality from ischaemic heart disease and other cardiovascular diseases in 27 countries, 1968–1977;Pisa;World Health Stat Q,1982
3. Survival rate at middle-age in developing and Western populations;Walker;Postgrad Med J,1974
4. Biosocial factors and hypertension in urban and rural Zulu;Seedat;S Afr Med J,1982
5. Smoking behaviour of white, black, coloured and Indian South Africans: Some statistical data on a major public health hazard;Van der Burgh;S Afr Med J,1979