SMITH-CLARKE, G T <br/><br/>
A positive-negative pressure respirator.  [electronic resource] 

 -  Lancet (London, England)  Jun 1955 
 - 1299-1300 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0140-6736 
<br/><br/><label>Standard No.: </label>10.1016/s0140-6736(55)92059-6  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Humans<br/>Ventilators, Mechanical<br/>Ventilators, Negative-Pressure