Smoothey , Marion  <br/><br/>
Let 's investigate calculators : 

 - Marsall :  London ;  1995. 
 - 64 p ; 24cm .  01 
 - 2024-07-22 
<br/><br/><label>ISBN: </label>1854357778 
<br/><br/><label>Nat. Bib. No.: </label>0009953 
<br/><br/><label>Nat. Bib. Agency Control No.: </label>SMO 
<br/><br/><label>Universal Decimal Class. No.: </label>510