RITCHIE, A E <br/><br/>
Thermionic valve stimulators; their value and limitations.  [electronic resource] 

 -  The British journal of physical medicine : including its application to industry   
 - 101-9 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Heart Valves<br/>Humans