TY  - RPRT
TI  - A multipurpose anglepiece with expiratory valve.
AU  - R B CLAYTON
PY  - 1955
DO  - 10.1111/j.1365-2044.1955.tb01588.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14376835/
ID  - 14376835
ER  -