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- [42] PREVALENCE OF BRONCHITIS AND AIRWAY OBSTRUCTION IN AMERICAN BITUMINOUS COAL MINERS AMERICAN REVIEW OF RESPIRATORY DISEASE, 1973, 108 (04): : 886 - 893
- [49] TOTAL DUST, COAL, FREE SILICA, AND TRACE METAL CONCENTRATIONS IN BITUMINOUS COAL MINERS LUNGS AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL, 1971, 32 (07): : 432 - +
- [50] TOTAL DUST, COAL, FREE SILICA, AND TRACE METAL CONCENTRATIONS IN BITUMINOUS COAL MINERS LUNGS AMERICAN INDUSTRIAL HYGIENE ASSOCIATION JOURNAL, 1970, 31 (02): : 6 - &