Edwards, Allen. <br/><br/>
The hand-held calculator in a Third-world country / 
Allen Edwards. 
 - Port Moresby :  Numeracy Project, Laloki College,  1982. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Number concept.<br/>Mathematics--Study and teaching--Papua New Guinea.<br/>Calculators.<br/>Non-formal education--Papua New Guinea.