NORRIS, G L <br/><br/>
The effect of a single inspiration in lead III and a precordial lead of the human electrocardiogram.  [electronic resource] 

 -  Annals of internal medicine  Mar 1951 
 - 641-54 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0003-4819 
<br/><br/><label>Standard No.: </label>10.7326/0003-4819-34-3-641  doi 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Electrocardiography<br/>Humans<br/>Respiration