Longitudinal and cross sectional analyses of exposure to coal mine dust and pulmonary function in new miners

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      <subfield code="a">The association between exposure to dust and pulmonary function was studied by longitudinal and cross sectional analyses in a group of United States underground coal miners beginning work in or after 1970. Quantitative estimates of exposure to respirable coal mine dust were derived from air samples taken periodically over the entire study period</subfield>
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      <subfield code="t">British journal of industrial medicine</subfield>
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      <subfield code="g">nº 10, October 1993 ; p. 929-937</subfield>
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