TY  - RPRT
TI  - Chronic bronchitis and emphysema.
AU  - J R Webster
AU  - W W Addington
PY  - 1971
DO  - 10.1080/00325481.1971.11697701
UR  - https://pubmed.ncbi.nlm.nih.gov/5128034/
ID  - 5128034
ER  -