TY  - RPRT
TI  - Chronic obstructive lung disease.
AU  - N G Sanerkin
AU  - K N Palmer
PY  - 1971
DO  - 10.1016/s0140-6736(71)92333-6
UR  - https://pubmed.ncbi.nlm.nih.gov/4105625/
ID  - 4105625
ER  -