LANGNER, P H <br/><br/>
High fidelity electrocardiography; further studies including the comparative performance of four different electrocardiographs.  [electronic resource] 

 -  American heart journal  May 1953 
 - 683-90 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0002-8703 
<br/><br/><label>Standard No.: </label>10.1016/0002-8703(53)90310-x  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrocardiography<br/>Humans