TY  - RPRT
TI  - Research into bronchitis and emphysema.
AU  - C M Fletcher
AU  - N L Jones
AU  - E J Campbell
PY  - 1968
DO  - 10.1136/pgmj.44.507.48
UR  - https://pubmed.ncbi.nlm.nih.gov/5639228/
ID  - 5639228
ER  -