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Silicosis in slate pencil workers. A clinicoradiologic study.

We present a study of 151 persons working in slate-pencil manufacturing industries located in the Mandsaur district of Madhya Pradesh, India. Cough, dyspnea, and pain in the chest were the important symptoms. Cyanosis, rhonchi, and crepitations were found in varying numbers of cases. The chest x-ray films were abnormal in 85 cases.