Ogden, Harry <br/><br/>
Workshop numeracy/ 
Harry Ogden: 
 - Great Britain;  Pitman Publishing Limited;  1984. 
 - ix,141p,  ill,  25cm 
<br/><br/><label>ISBN: </label>0273018981 
<br/><br/><label>LC Class. No.: </label>TJ1165  / Og2 .1984