Pulmonary problems among quarry workers of stone crushing pulmonary problems among quarry workers of stone crushing industrial site at umuoghara ebonyi state nigeria background respiratory problem is one of the major health hazards in dustexposed workers it is a major cause of morbidity and mortality all over the world
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Quarry workers of stone crushing industrial site at umuoghara ebonyi state nigeria an nwibo1 ei ugwuja1 no nwambeke2 of emelumadu2 lu ogbonnaya3 abstract background respiratory problem is one of the major health hazards in dustexposed workers it is a major cause of morbidity and mortality all over the world
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