A Survey of chronic bronchitis among brassware workers

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      <subfield code="a">A stratified random sample of 580 workers aged between 18 and 50 years representing each sub-occupation in the brassware industry was studied for the prevalence of chronic bronchitis in relation to occupational and environmental factors. The findings were compared with those obtained in a reference group belonging to similar socio-economic status and unexposed to a dusty environment</subfield>
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