TY  - RPRT
TI  - A piston-type nonrebreathing valve.
AU  - G W NEWTON
AU  - W K NOWILL
AU  - C R STEPHEN
PY  - 1955
DO  - 10.1097/00000542-195511000-00030
UR  - https://pubmed.ncbi.nlm.nih.gov/13353813/
ID  - 13353813
ER  -