Lock, J. B.  <br/><br/>
Arithmetic for Schools /  
J. B. Lock 
 - London :   Macmillan and co.,   1982 
 - 330 p.  
<br/><br/><label>Subjects--Topical Terms: </label>--ARITMETICA 
<br/><br/><label>Universal Decimal Class. No.: </label>51