TY  - GEN
AU  - Fletcher, Charles, et. al.
TI  - The natural history of chronic bronchitis and emphysema: an eight-year study of early chronic obstructive lung disease in working men in London
SN  - 0192611194
PY  - 1976///
CY  - Glasgow
PB  - Oxford University Press
KW  - Bronchitis -- England -- London -- Epidemiology
KW  - Emphysema, Pulmonary -- England -- London -- Epidemiology
KW  - Pulmonary function tests
ER  -