TY  - RPRT
TI  - Effects of sputum on pulmonary function.
AU  - G M Cochrane
AU  - B A Webber
AU  - S W Clarke
PY  - 1977
DO  - 10.1136/bmj.2.6096.1181
UR  - https://pubmed.ncbi.nlm.nih.gov/589074/
ID  - 589074
ER  -