1. Atmospheric Pollution
Robert E. Wallen, B.Sc. 
CHEST 
Volume 96, Issue 3, Pages 363S-368S (September 1989)
DOI: /chest.96.3_Supplement.363S
Copyright © 1989 The American College of Chest Physicians Terms and Conditions

2. Figure 1
Standardized mortality ratios for chronic bronchitis in men aged during and infant mortality from bronchitis and pneumonia per 1,000 births in in 212 areas of England and Wales. X = county boroughs; Δ = London boroughs; 0 = urban areas; 4- = rural areas. (From Barker and Osmond, by permission.18)
CHEST  , 363S-368SDOI: ( /chest.96.3_Supplement.363S)
Copyright © 1989 The American College of Chest Physicians Terms and Conditions

3. Figure 2
Respiratory infections, air pollution, and other factors in the development of chronic airways disease.
CHEST  , 363S-368SDOI: ( /chest.96.3_Supplement.363S)
Copyright © 1989 The American College of Chest Physicians Terms and Conditions