TY  - BOOK
TI  - The Natural history of chronic bronchitis and emphysema: an eight year study of early chronic obstructive lung disease in working men in London: Charles Fletcher...[et al.]
SN  - 0-19-261119-4.
U1  - 616.23009 
PY  - 1976///
CY  - Oxford
PB  - Oxford Univ.
N1  - Inlcudes bibliographical references and indes
ER  -