Apud, E <br/><br/>
[Heart rate at the work site as an index of physiologic overload].  [electronic resource] 

 -  Revista medica de Chile  Mar 1974 
 - 214-7 p.  digital 
<br/><br/> Publication Type: English Abstract; Journal Article 
<br/><br/><label>ISSN: </label>0034-9887 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Cardiac Output<br/>Electrocardiography<br/>Heart Rate<br/>Humans<br/>Male<br/>Mining<br/>Occupational Medicine<br/>Pulse