TY  - RPRT
TI  - Chronic obstructive lung disease.
AU  - K N Palmer
AU  - J G Scadding
PY  - 1971
DO  - 10.1016/s0140-6736(71)91804-6
UR  - https://pubmed.ncbi.nlm.nih.gov/4104741/
ID  - 4104741
ER  -