TY  - GEN
AU  - SMITH-CLARKE,G T
AU  - GALPINE,J F
TI  - A positive-negative pressure respirator
SN  - 0140-6736
PY  - 2003///0501
KW  - Humans
KW  - Ventilators, Mechanical
KW  - Ventilators, Negative-Pressure
N1  - Publication Type: Journal Article
UR  - https://doi.org/10.1016/s0140-6736(55)92059-6
ER  -