Gatford, J. D. <br/><br/>
Calculator exercises for year nine / 
J.D. Gatford, C. Pitman. 
 - Melbourne :  Longman Cheshire,  c1979. 
 - xi, 120 p. :  ill. 
<br/><br/><label>ISBN: </label>0582685494 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Calculators.<br/>Mathematical instruments.