• Epidemiological surveillance shows broad cross-population burden of occupational respiratory disease, using cross-sectional surveys and mortality follow-up across Britain, the US, Canada, and Ireland to map prevalence and trends [2], [11], [19], [4], [7], [18], [10].

• Dust exposure and disease: systematic assessment of pneumoconiosis and byssinosis in coal miners and flax workers, with environmental dust considerations and symptom profiles informing exposure thresholds [16], [8], [4].

• Smoking as a confounder and risk modifier for respiratory illness: early reports identify airway obstruction linked to smoking and interactions with occupational exposures in bronchitis and lung cancer [6], [17], [12].

• Methodological frameworks for pulmonary health studies: standardized pulmonary function testing and survey-based approaches across industrial cohorts to quantify disability and disease [5], [10], [19].