Geeseman, R <br/><br/>
A heart rate telemetry system to study activity of children during free play.  [electronic resource] 

 -  Research quarterly  Dec 1971 
 - 450-3 p.  digital 
<br/><br/> Publication Type: Journal Article 
<br/><br/><label>ISSN: </label>0034-5377 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Analog-Digital Conversion<br/>Child<br/>Electrodes<br/>Heart Function Tests--instrumentation<br/>Heart Rate<br/>Humans<br/>Methods<br/>Online Systems<br/>Play and Playthings