TY  - RPRT
TI  - Another problem with an expiratory valve.
AU  - A W Murray
AU  - J C Easton
PY  - 1988
DO  - 10.1111/j.1365-2044.1988.tb05614.x
UR  - https://pubmed.ncbi.nlm.nih.gov/3202306/
ID  - 3202306
ER  -