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2. The prevalence of chronic bronchitis in an industrial population;Brinkman, G. L.; Coates, E. 0;Amer. Rev. resp. Dis,1962
3. Mortality from lung cancer and Bronchitis in relation to Smoke and Sulphur Dioxide Concentration, Population Density and Social Index;Buck, S.F.; Brown, D.A.;Tobacco Research Council. Research Paper,1964
4. Air pollution and other local factors in respiratory disease;Fairbairn, A.S.; Reid, D.D.;Brit. J. prev. soc. Med,1958
5. Prevalence of chronic respiratory disease in a pulp mill and a paper mill in the United States;Ferris, B.G.; Burgess, W.A.; Worcester, J.;Brit. J. industr. Med,1967