TY  - RPRT
TI  - Automatic non-rebreathing valve circuits: some principles and modifications.
AU  - S N STEEN
AU  - J L CHEN
PY  - 1963
DO  - 10.1093/bja/35.6.379
UR  - https://pubmed.ncbi.nlm.nih.gov/13983579/
ID  - 13983579
ER  -