TY  - RPRT
TI  - Chronic obstructive pulmonary disease.
AU  - D C Flenley
PY  - 1988
DO  - 10.1016/0011-5029(88)90015-6
UR  - https://pubmed.ncbi.nlm.nih.gov/3048940/
ID  - 3048940
ER  -