Morbidity survey of Indian coal miners with special reference to pneumoconiosis.
D001991:Bronchitis / Q000453:epidemiology; D003032:Coal Mining; D007194:India; D009787:Occupational Medicine; D011009:Pneumoconiosis / Q000453:epidemiology*; D012140:Respiratory Tract Diseases / Q000453:epidemiology*; D014397:Tuberculosis, Pulmonary / Q000453:epidemiology