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2. The prevalence of chronic respiratory disease in a New Hampshire town;Ferris;Am Rev Respir Dis,1962
3. Role of tobacco smoking in the causation of chronic respiratory disease;Anderson;N Engl J Med,1963
4. Chronic nonspecific respiratory disease, Berlin, New Hampshire, 1961–1967: a cross-sectional study;Ferris;Am Rev Respir Dis,1971
5. Chronic nonspecific respiratory disease in Berlin, New Hampshire, 1961–1967: a follow-up study;Ferris;Am Rev Respir Dis,1973