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2. Epidemiology of gastrointestinal cancer;Berg, J.W.; Haenszel, W.; DeVesa, S.S.,1973
3. Epidemiology of cancer of the colon and rectum;Burkitt, D.P.;Cancer (Philad.),1971
4. The geographical distribution of cancer;Doll, R.;Brit. J. Cancer,1969
5. Cancer incidence infive Continents;Doll, R.; Muir, C.; Waterhouse, J.,1970