Do-it-yourself venting appliance for use with a popular expiratory valve.

Sorry, there's nothing here.

Cite this paper

@article{Boyd1972DoityourselfVA, title={Do-it-yourself venting appliance for use with a popular expiratory valve.}, author={Christine H. Boyd}, journal={British journal of anaesthesia}, year={1972}, volume={44 9}, pages={992} }