Bolton, J <br/><br/>
The use of sand-timers in the measurement of respiratory and pulse rates in children.  [electronic resource] 

 -  Papua and New Guinea medical journal  Dec 1990 
 - 317-8 p.  digital 
<br/><br/> Publication Type: Letter 
<br/><br/><label>ISSN: </label>0031-1480 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Child<br/>Community Health Workers--methods<br/>Heart Rate<br/>Humans<br/>Papua New Guinea<br/>Respiration<br/>Time<br/>Weights and Measures