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2. Epidemiologic health survey of grain elevator workers in British Columbia;Chan-Yeung;Am Rev Respir Dis,1980
3. Chronic bronchitis and decreased forced expiratory flow rates in lifetime unsmoking grain workers;Dosman;Am Rev Respir Dis,1980
4. Rapid decline in FEV1 in grain handlers in relation to level of dust exposure;Enarson;Am Rev Respir Dis,1985
5. Prevalence and risk factors of chronic respiratory disease in a farming population;Saia;Med Lav,1984